Anali za istrske in mediteranske študijeAnnali di Studi istriani e mediterranei Annals for Istrian and Mediterranean Studies 

UDK 5                       Annales, Ser. hist. nat., 29, 2019, 2, pp. 159-280, Koper 2019 ISSN1408-533X 
UDK 5 ISSN 1408-533X (Print) ISSN 2591-1783 (Online) 

Anali za istrske in mediteranske študije Annali di Studi istriani e mediterranei Annals for Istrian and Mediterranean Studies 
Series Historia Naturalis, 29, 2019, 2 
KOPER 2019 
Anali za istrske in mediteranske študije - Annali di Studi istriani e mediterranei - Annals for Istrian and Mediterranean Studies 
ISSN 1408-533X (Tiskana izd.)    UDK 5 Letnik 29, leto 2019, številka 2 ISSN 2591-1783 (Spletna izd.) 
Alessandro Acquavita (IT), Nicola Bettoso (IT), Christian Capapé UREDNIŠKI ODBOR/ (FR), Darko Darovec, Dušan Devetak, Jakov Dulčić (HR), Serena COMITATO DI REDAZIONE/ Fonda Umani (IT), Andrej Gogala, Daniel Golani (IL), Danijel 
BOARD OF EDITORS: Ivajnšič, Mitja Kaligarič, Marcelo Kovačič (HR), Andrej Kranjc, Lovrenc Lipej, Vesna Mačić (ME), Alenka Malej, Patricija Mozetič, Martina Orlando-Bonaca, Michael Stachowitsch (AT), Tom Turk, Al Vrezec 
Glavni urednik/Redattore capo/ Editor in chief: Darko Darovec 
Odgovorni urednik naravoslovja/ 

Redattore responsabile per le scienze naturali/Natural Science Editor: Lovrenc Lipej 
Urednica/Redattrice/Editor: Martina Orlando-Bonaca 
Lektor/Supervisione/Language editor: Polona Šergon (sl.), Petra Berlot Kužner (angl.) 
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Inštitut IRRIS za raziskave, razvoj in strategije družbe, kulture in okolja / Institute IRRIS for Research, Development and Strategies of Society, Culture and Environment / Istituto IRRIS di ricerca, sviluppo e strategie della societa, cultura e ambiente© 
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Address of Editorial Board: Istituto nazionale di biologia, Stazione di biologia marina di Pirano / National Institute of Biology, Marine Biology Station Piran SI-6330 Piran /Pirano, Fornače/Fornace 41, tel.: +386 5 671 2900, fax +386 5 671 2901; e-mail: annales@mbss.org, internet: www.zdjp.si 
Redakcija te številke je bila zaključena 21. 12. 2019. 
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Revija Annales, Series Historia Naturalis je vključena v naslednje podatkovne baze / La rivista Annales, series Historia Naturalis e inserita nei seguenti data base / Articles appearing in this journal are abstracted and indexed in: BIOSIS-Zoological Record (UK); Aquatic Sciences and Fisheries Abstracts (ASFA); Elsevier B.V.: SCOPUS (NL). 
Vsi članki so v barvni verziji prosto dostopni na spletni strani: http://zdjp.si/p/annalesshn/ All articles are freely available in color via website: http://zdjp.si/en/p/annalesshn/ 
Anali za istrske in mediteranske študije - Annali di Studi istriani e mediterranei - Annals for Istrian and Mediterranean Studies 
UDK 5                                                      Letnik 29, Koper 2019, številka 2                                      ISSN 1408-533X (Print) ISSN 2591-1783 (Online) 


VSEBINA / INDICE GENERALE / CONTENTS 2019(2) 
50 LET MORSKE BIOLOŠKE POSTAJE  
NACIONALNEGA INŠTITUTA ZA BIOLOGIJO  
I 50 ANNI DELLA STAZIONE DI BIOLOGIA  
MARINA DELL'ISTITUTO NAZIONALE  
DI BIOLOGIA  
50 YEARS OF THE MARINE BIOLOGY STATION  
OF THE NATIONAL INSTITUTE OF BIOLOGY  
Lovrenc LIPEJ, Domen TRKOV, Domen STANIČ,  
Sara CERNICH & Saul CIRIACO  
First Record of Sergeant Major, Abudefduf  
saxatilis (Linnaeus, 1758) in the Adriatic Sea .........  159  
Prvi zapis o pojavljanju velikega seržanta,  
Abudefduf saxatilis (Linnaeus, 1758)  
v Jadranskem morju  
Valentina PITACCO & Selahattin Ünsal KARHAN  
First Record of Flabelliderma cinari Karhan,  
Simboura & Salazar-Vallejo, 2012 (Polychaeta:  
Flabelligeridae) from the Adriatic Sea ...................  167  
Prvi zapis o pojavljanju vrste Flabelliderma  
cinari Karhan, Simboura & Salazar-Vallejo, 2012  
(Polychaeta: Flabelligeridae) v Jadranskem morju  
Ana FORTIČ, Domen TRKOV, Borut MAVRIČ  
& Lovrenc LIPEJ  
Assessment of Bryozoan Xenodiversity  
in the Slovenian Coastal Sea .................................  173  
Ocena ksenodiverzitete mahovnjakov  
v slovenskem obalnem morju  
Martina ORLANDO-BONACA, Janja FRANCÉ,  
Borut MAVRIČ & Lovrenc LIPEJ  
Impact of the Port of Koper on  
Cymodocea nodosa Meadow ...............................  187  
Vpliv koprskega pristanišča na travnik  
kolenčaste cimodoceje (Cymodocea nodosa)  

IHTIOLOGIJA ITTIOLOGIA ICHTHYOLOGY  
Akraam Faraj KARA, Mohamed AL HAJAJI, Hisham GHMATI & Esmail A. SHAKMAN Food and Feeding Habits of Mustelus mustelus (Linnaeus, 1758) (Chondrichthyes: Triakidae) Along the Western Coast of Libya ......................... Prehranjevalne navade navadnega morskega psa, Mustelus mustelus (Linnaeus, 1758) (Chondrichthyes: Triakidae), vzdolž zahodne obale Libije Youssouph DIATTA, Almamy DIABY, Sihem RAFRAFI-NOUIRA & Christian CAPAPÉ Capture of a Rare Endangered Species Leafscale Gulper Shark Centrophorus squamosus (Chondrichthyes: Squalidae) from the Coast of Senegal (Eastern Tropical Atlantic) .................... Ulov redkega in ogroženega morskega psa Centrophorus squamosus (Chondrichthyes: Squalidae) iz obalnih voda Senegala (vzhodni tropski Atlantik) Sihem RAFRAFI-NOUIRA, Christian REYNAUD & Christian CAPAPÉ Morphological Deformities in a Striped Sea Bream Lithognathus mormyrus (Osteichthyes: Sparidae) from Northern Tunisian Waters (Central Mediterranean Sea) ................................. Morfološke deformacije pri ovčici Lithognathus mormyrus (Osteichthyes: Sparidae) iz severno tunizijskih vod (osrednje Sredozemsko morje)  197 205 211  

Sihem RAFRAFI-NOUIRA, Christian REYNAUD &  
Christian CAPAPÉ  
On a Occurrence of Gadella maraldi  
(Osteichthyes: Gadiformes: Moridae) on the  
Tunisian Coast (Central Mediterranean Sea) ..........  219  
O pojavljanju vrste Gadella maraldi  
(Osteichthyes: Gadiformes: Moridae) ob  
tunizijski obali (osrednje Sredozemsko morje)  
Mohamed Mourad BEN AMOR, Marouene  
BDIOUI, Khadija OUNIFI-BEN AMOR, Christian  
REYNAUD & Christian CAPAPÉ  
Unusual Record of Round Fantail Stingray  
Taeniurops grabata (Chondrichthyes:  
Dasyatidae) from the Tunisian Coast  
(Central Mediterranean Sea) .................................  223  
Nenavadni zapis o pojavljanju morskega biča  
vrste Taeniurops grabata (Chondrichthyes:  
Dasyatidae) iz tunizijskih voda (osrednje  
Sredozemsko morje)  
JADRANSKA MORSKA FAVNA  
FAUNA MARINA ADRIATICA  
ADRIATIC MARINE FAUNA  
Roland R. MELZER, Martin HEß, Manuel A.  
STAGGL, Tihomir MAKOVEC & Borut MAVRIČ  
Hippolyte prideauxiana Leach, 1817: First  
Record for the Northern Adriatic and  
Observations on Mimetic Colouration ..................  231  
Hippolyte prideauxiana Leach, 1817: prvi  
zapis o pojavljanju v severnem Jadranu  
s podatki o barvnemu prikrivanju  
Mona REZAEI, Al VREZEC, Borut MAVRIČ  
& Lovrenc LIPEJ  
Biometry and Population Gender Structure  
of Three Crab Species (Crustacea:  
Decapoda) from Sandy Bottom  
in the Northern Adriatic Sea .................................  235  
Biometrija in spolna struktura pri treh vrstah  
rakovic (Crustacea: Decapoda) iz sedimentnega  
dna severnega Jadrana  

ONESNAŽEVANJE OKOLJA 
INQUINAMENTO DELL’AMBIENTE ENVIRONMENTAL POLLUTION 
Sezginer TUNÇER, Sedat GÜNDOGDU, Cem ÇEVIK & Aytug ZILIFLI 
Belone belone (Linnaeus, 1760) and Spicara smaris (Linnaeus, 1758) Entangled in Plastic Collars in the Dardanelles Strait, Turkey ............... 247 Iglica, Belone belone (Linnaeus, 1760), in girica, Spicara smaris (Linnaeus, 1758), zapleteni v plastični ovoj v ožini Dardanele, Turčija 

Jamila FLIOU, Ali AMECHROUQ, Mohammed ELHOURRI, Ouassima RIFFI & Mostafa EL IDRISSI 
Determination of Heavy Metal Content in a Daphne gnidium L. Plant Using Atomic Absorption Spectroscopy ...................................... 253 
Določevanje vsebnosti težkih kovin v volčinu vrste Daphne gnidium L. z uporabo atomske absorbcijske spektroskopije 
DELO NAŠIH ZAVODOV IN DRUŠTEV 
ATTIVITA DEI NOSTRI ISTITUTI E SOCIETA ACTIVITIES BY OUR INSTITUTIONS AND ASSOCIATIONS 


Simon KERMA 
Half a Century of the Marine Biology Station Piran ............................................ 261 
Pol stoletja delovanja Morske biološke postaje Piran 
Navodila avtorjem ................................................ 267 Istruzioni per gli autori .......................................... 269 Instruction to Authors ............................................ 271 
Kazalo k slikam na ovitku ..................................... 273 Index to images on the cover ................................ 273 

received: 2019-09-20 DOI 10.19233/ASHN.2019.24 

HIPPOLYTE PRIDEAUXIANA LEACH, 1817: FIRST RECORD FOR THE NORTHERN ADRIATIC AND OBSERVATIONS ON MIMETIC COLOURATION 
Roland R. MELZER 
Zoologische Staatssammlung München, Münchhausenstr. 21, 81247 München, Germany & Department Biologie II, Ludwig-Maximilians-Universität München, Großhaderner Straße 2, 82152 Planegg-Martinsried, Germany e-mail: melzer@snsb.de 
Martin HEß 
Department Biologie II, Ludwig-Maximilians-Universität München, Großhaderner Straße 2, 82152 Planegg-Martinsried, Germany 
Manuel A. STAGGL 
Fakultät für Lebenswissenschaften, Universität Wien, Althanstr. 14, A-1090 Wien, Austria 
Tihomir MAKOVEC & Borut MAVRIČ 
Marine Biology Station, National Institute of Biology,Fornače 41, 6330 Piran, Slovenia 
ABSTRACT 
We present the first record of Hippolyte prideauxiana Leach, 1816 for the northern Adriatic and the second re­cord for the Adriatic Sea based on seven specimens we found during our faunistic inventory of the marine protected area of the Brijuni National Park, Croatia. Moreover, we give the first description of the appearance of 7 mm-juveniles and discuss the stage-specific traits of the crinoid mimesis of this species. 
Key words: Hippolyte prideauxiana, colouration, Antedon mediterranea, mimesis, Adriatic Sea 
HIPPOLYTE PRIDEAUXIANA LEACH, 1817: PRIMO RITROVAMENTO PER L’ADRIATICO SETTENTRIONALE E OSSERVAZIONI SULLA COLORAZIONE MIMETICA 
SINTESI 
Gli autori presentano il primo ritrovamento di Hippolyte prideauxiana Leach, 1816 per l’Adriatico settentrionale e il secondo per il mare Adriatico, in base a sette esemplari trovati durante l’inventario faunistico condotto nell’area marina protetta del Parco nazionale di Brioni, in Croazia. Nell’articolo viene inoltre riportata la prima descrizione dell’aspetto di giovani esemplari di 7 mm, e vengono discussi i tratti specifici della fase di mimesi crinoide di questa specie. 
Parole chiave: Hippolyte prideauxiana, colorazione, Antedon mediterranea, mimesi, mare Adriatico 
231 
INTRODUCTION 
Species of Hippolyte Leach, 1814 are masters of camouflage that by virtue of their chromophores adapt to various substrates, e.g., algae and seaweed. Hippolyte inermis Leach, 1816 and a few other Medi­terranean species exhibit seaweed mimesis, viz. they perfectly imitate the green colour of the seaweed. Even more sophisticated types of mimesis are found in species of Hippolyte that are epizoans of other marine invertebrates. Hippolyte prideauxiana Leach, 1817 is exclusively found on crinoids, e.g., Antedon mediter­ranea (Lamarck, 1816) (d’Udekem d’Acoz, 1996, 2007). These species match in appearance the same coloura­tion as the crinoid. So far, females, immature females and males have been described by d’Udekem d’Acoz (1996, 2007). According to his observations, males and immature females have a dorsal red and yellow stripe, a ventrolateral red line, and two transvere red and yellow lines on the carapace. Adult females are similar, but the transverse lines are found all over the body. Until now there has been only one published record of this species for the Adriatic Sea (near Rijeka; Kirinčić, 2006), though its host, A. mediterranea is not a rare species in this part of the Mediterranean. 
MATERIAL AND METHODS 
While scuba diving off the coast of the Brijuni archi­pelago, we searched crinoids, Antedon mediterranea, for Hippolyte prideauxiana. Afterwards, we identified the Hippolytes from underwater photos or took them to­gether with their hosts to the lab to take aquarium photos of the living shrimp and observe their colouration and 


Fig. 1: Hippolyte prideauxiana. A) Adult female photographed in the wild at its usual resting place on the ventral side of an Antedon mediterranea near the cirri (photo: B. Mavrič). B) Another adult female showing a perfect Antedon mimesis (aquarium photo: M. Staggl). C) Juvenile on top of pinnules, dorsal view (aquarium photo: B. Mavrič). D) Lateral view showing that the transversal stripes are not yet present (aquarium photo: M. Staggl). Sl. 1: Hippolyte prideauxiana. A) Odrasla samica, fotografirana v naravi med mirovanjem na spodnji strani morske lilije blizu cirov (foto: B. Mavrič). B) Odrasla samica, ki se dobro prikriva na morski liliji (akvarijski posnetek: M. Staggl): C) Mladostni primerek na vrhu pinul, hrbtni pogled (akvarijski posnetek, foto: B. Mavrič). D) S strani je vidno, da prečnih prog še ni (akvarijski posnetek: M. Staggl). 
behaviour. For identification in the lab we used the key and detailed species description by d’Udekem d’Acoz (1996). We found H. prideauxiana at two localities, the south slope of Otok Gaz (44°56’8.33” N, 13°43’6.56” E) at a depth of about 23 m and off Rt Lansir (44°56’24.82” N, 13°44’33.39” E), also at about 20 m. Three of the specimens have been preserved in 75 % ethanol, one egg-carrying female (total length 22 mm), one female not carrying eggs (18 mm) and a juvenile (7 mm). They are stored in collns Arthropoda varia at the Bavarian State Collection of Zoology. 
RESULTS 
During our faunistic studies in the marine protected area in the Brijuni National Park (Melzer et al., 2016; Cesena et al., 2017), we documented a specimen of 
H. prideauxiana on A. mediterranea at the south slope of Otok Gaz at a depth of about 23m in May 2018. In May 2019, we searched numerous crinoids in situ and found six more specimens of H. prideauxiana. Two of these, again, were documented off Otok Gaz, while the remaining four specimens were found off Lansir. In Figure 1A, a photo taken in the wild is shown; Figs. 1B, C and D show images captured in a photo aquarium in the lab. Five of the altogether seven observed specimens were adult females, and two were juveniles of about 7 mm length (Figs. 1C, D). 
The females of H. prideauxiana had colourfull transverse bands covering the body including the pleon. They were white around the edges while the central area was red with a yellow midline. In addition, a red dorsal and yellow band was present. Conversely, in the juvenile specimens, the transverse bands were absent but the dorsal red and yellow stripe, as well as a ventro-lateral red line on each side of the body were distinct. The adult shrimps very often sat at the base of the arms in such a way as to align their transverse stripes to the crinoids’ pinnules. Conversely, the juvenile specimens spent a lot of time standing on top of pinnules oriented approximately in line with them in such a way that their longitudinal stripes were parallel to the pinnules. Otherwise, they moved around almost everywhere on the distal part of the arms. 
DISCUSSION 
Our records of this species are the second for the Adriatic and the first for the Northern Adriatic accord­ing to the biogeographic zones delineated by Bianchi (2004) and Relini (2010), where the southern border of biogeographic area “9”, the northern Adriatic sector, is placed between Conero and Kamenjak. 
In addition, our observations of our specimens’ mark­ings are of interest. Firstly, the colouration pattern of the females we observed corresponds very well with that described in d’Udekem d’Acoz (1996). Secondly, the 7 mm juveniles present another type of garb that is prob­ably the ontogenetically earliest stage known to date and differs from those described earlier. These specimens had no transverse lines at all, but the longitudinal ones were already developed. We suggest that this stage is the forerunner of the colouration of the older shrimps, in other words, at some point during ontogeny, after a certain body size has been reached, the differentiation of transversal stripes begins, maybe first on the carapace (in males and/or immature females), and then all over the body (in mature females). 
Looking at our photos of adults, it is very tempting to say that with respect to their colours, shape and size, the transverse stripes imitate pinnules, i.e., the side branches of the feather star’s arms. Conversely, the longitudinal stripes of the much smaller juveniles could provide the same masquerade, but with a pattern twisted 90 degrees to that of the adults. There have been several detailed attempts to understand the mimetic colouration of spe­cies of Hippolyte (e.g., Hacker & Madin 1991; Duarte et al., 2016, 2017). We suggest that similar analyses of H. prideauxiana could be very interesting. 
It seems that the abundance of H. prideauxiana in the Northern Adriatic is relatively low, since we searched numerous Antedons during our campaigns in 2018 and 2019, and found altogether the seven specimens mentioned in this paper. Nevertheless, it’s difficult to say whether our Hippolytes are hard to find because their camouflage technique is so close to perfection that they have been overlooked until present, or if the number of faunistic studies has been too low to detect them, or if they are really rare, indicating that the Brijuni MPA is a sanctuary for this species. Interesting to note is the fact that some of the authors have been studying the northern Adriatic benthos off Piran and Rovinj for decades using both scuba diving and dredges without finding a single individual of H. prideauxiana. 
ACKNOWLEDGEMENTS 
Our inventory of Brijuni MPA is conducted with the permission and support of Brijuni National Park and the Croatian Ministry of Environment and Energy in Zagreb. We thank Sandro Dujmović and the staff of the Brijuni National Park for their great support. Special thanks go to the rest of the 2019 team: Moira Bursić, Christina Egger, Peter Kohnert and Martin Pfannkuchen. This study is part of Melzer’s project “Biodiversity of the Brijuni marine protected area and adjacent sectors of the Adriatic Sea” funded by Sea Life Center Munich. 

HIPPOLYTE PRIDEAUXIANA LEACH, 1817: PRVI ZAPIS O POJAVLJANJU V SEVERNEM 

JADRANU S PODATKI O BARVNEMU PRIKRIVANJU 
Roland R. MELZER 
Zoologische Staatssammlung München, Münchhausenstr. 21, 81247 München, Germany & Department Biologie II, Ludwig-Maximilians-Universität München, Großhaderner Straße 2, 82152 Planegg-Martinsried, Germany e-mail: melzer@snsb.de 
Martin HEß 
Department Biologie II, Ludwig-Maximilians-Universität München, Großhaderner Straße 2, 82152 Planegg-Martinsried, Germany 
Manuel A. STAGGL 
Fakultät für Lebenswissenschaften, Universität Wien, Althanstr. 14, A-1090 Wien, Austria 
Tihomir MAKOVEC & Borut MAVRIČ 
Marine Biology Station, National Institute of Biology,Fornače 41, 6330 Piran, Slovenia 
POVZETEK 
Avtorji poročajo o prvi najdbi vrste Hippolyte prideauxiana Leach, 1816 v severnem Jadranu in drugem zapisu za celotno Jadransko morje. Podatki temeljijo na najdbah sedmih primerkov, najdenih med inventarizacijo favne v morskem zavarovanem območju v okviru Nacionalnega Parka Brijoni na Hrvaškem. Poleg tega avtorji podajajo prvi opis 7 mm dolgega juvenilnega primerka in razpravljajo o značilnostih prikrivanja različnih stadijev te kozice na morskih lilijah. 
Ključne besede: Hippolyte prideauxiana, barvni vzorec, Antedon mediterranea, prikrivanje, Jadransko morje 
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