Decapod Crustaceans of the Southwest Kamchatka Shelf: R/V Professor Levanidov Collection in June 1996
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Arthropoda Selecta 10 (2): 103136 © ARTHROPODA SELECTA, 2001 Decapod Crustaceans of the Southwest Kamchatka Shelf: R/V Professor Levanidov collection in June 1996 Äåñÿòèíîãèå ðàêîîáðàçíûå (Crustacea: Decapoda) þæíîé ÷àñòè çàïàäíî-êàì÷àòñêîãî øåëüôà: ïî ñáîðàì íà ÍÈÑ Ïðîôåññîð Ëåâàíèäîâ â èþíå 1996 ã. V.I. Sokolov Â.È. Ñîêîëîâ Russian Federal Institute for Marine Fisheries and Oceanography (VNIRO), Verchnyaya Krasnoselskaya Str., 17a, Moscow 107140 Russia. Ðîññèéñêèé Ôåäåðàëüíûé Èíñòèòóò ìîðñêîãî ðûáíîãî õîçÿéñòâà è îêàíîãðàôèè (ÂÍÈÐÎ), óë. Âåðõíÿÿ Êðàñíîñåëüñêàÿ, ä. 17à, Ìîñêâà 107140 Ðîññèÿ. KEY WORDS: Decapod crustaceans, fauna, Sea of Okhotsk, West Kamchatka, protandric hermaphroditism. ÊËÞ×ÅÂÛÅ ÑËÎÂÀ: äåñÿòèíîãèå ðàêîîáðàçíûå, ôàóíà, Îõîòñêîå ìîðå, Çàïàäíàÿ Êàì÷àòêà, ïðîòåðàíäðè÷åñêèé ãåðìàôðîäèòèçì. ABSTRACT: Thirty two decapod species (ca. 6100 [Èâàíîâ, 1992] è, ñëåäîâàòåëüíî, òî÷íîì ìåñòîíà- specimens) were collected using a bottom trawl in the õîæäåíèè ðàçëè÷íûõ âèäîâ. ×àñòü ýòèõ ìàòåðèàëîâ southern part of the Kamchatka shelf at depth between â ïîñëåäñòâèè áûëà óòåðÿíà. Ïîýòîìó ìíîãèå äàí- 20 and 300 m. Two species, e.g. Argis ochotensis íûå î ðàñïðîñòðàíåíèè ðàçëè÷íûõ âèäîâ äåñÿòèíî- Komai, 1997 and Spirontocaris brevidigitata Kobjako- ãèõ ðàêîîáðàçíûõ â ðîññèéñêèõ äàëüíåâîñòî÷íûõ va, 1935 were recorded in the area for the first time, ìîðÿõ òðåáóþò äîïîëíåíèÿ è óòî÷íåíèÿ. while the latter species was found for the first time in the Èç âñåõ ðàéîíîâ Îõîòñêîãî ìîðÿ êàðöèíîëîãàìè entire Sea of Okhotsk. New material provide evidence íàèáîëåå àêòèâíî èçó÷àëñÿ øåëüô Çàïàäíîé Êàì- that the latter species and Spirontocaris spinus interme- ÷àòêè. Ïðèñòàëüíîå âíèìàíèå ê ýòîé ÷àñòè ìîðÿ dia are both well separated from Spirontocaris spinus, ñâÿçàíî ïðåèìóùåñòâåííî ñ çàïàäíîêàì÷àòñêîé ïî- contrary to earlier synonimization by Hayashi [1977]. ïóëÿöèåé êàì÷àòñêîãî êðàáà, ñèëüíî ýêñïëóàòèðóå- The most common species in the region investigated ìîé íà ïðîòÿæåíèè ïîñëåäíèõ äåñÿòèëåòèé. Ðàñïðå- were Chionoecets bairdi, Chionoecetes opilio, Paralith- äåëåíèå è áèîëîãèÿ äðóãèõ ïðîìûñëîâûõ âèäîâ ýòî- odes camtschaticus, Pagurus trigonocheirus, Labidoch- ãî ðàéîíà èçó÷àëè â çíà÷èòåëüíî ìåíüøåé ñòåïåíè. irus splendescens, and Hyas coarctatus alutaceus. All ×òî êàñàåòñÿ íåïðîìûñëîâûõ ðàêîîáðàçíûõ òî èõ these species but Chionoecetes bairdi are widely ranged èçó÷åíèåì â ïîñëåäíèå ãîäû ïðàêòè÷åñêè íå çàíè- in the Sea of Okhotsk. Paralithodes camtschaticus and ìàëèñü. Îáñòàíîâêà â çíà÷èòåëüíîé ñòåïåíè îñëîæ- Chionoecetes bairdi were most abundunt species in the íÿåòñÿ ïî÷òè ïîëíûì îòñóòñòâèåì íàó÷íî-èññëåäî- shallow waters. Pandalus borealis eous and Chiono- âàòåëüñêèõ ðàáîò íà ñïåöèàëèçèðîâàííûõ ñóäàõ.  ecetes opilio dominated in trawl catches in the depth ýòîé ñâÿçè äîâîëüíî ïîëíàÿ áåíòîñíàÿ ñúåìêà þæ- range of 200-300 m to the north of 52º00′N. The entire íîé ÷àñòè çàïàäíîêàì÷àòñêîãî øåëüôà, ïðîâåäåí- decapod fauna of the West Kamchatka shelf includes 50 íàÿ ÒÈÍÐÎ-Öåíòðîì ïðè ó÷àñòèè ÂÍÈÐÎ íà ÍÈÑ species. Remarks on morphological variation, size com- Ïðîô. Ëåâàíèäîâ â èþëå 1996 ã. ïðåäñòàâëÿåò position and the presence of ovigerous females are given íåñîìíåííûé èíòåðåñ. for most species. External sexual characters in Crangon Òðèäöàòü äâà âèäà (îêîëî 6100 ýêçåìïëÿðîâ) communis were studied in details in order to clear äåêàïîä áûëî ñîáðàíî â þæíîé ÷àñòè çàïàäíîêàì- whether this species is a protandric hermaphrodite. No ÷àòñêîãî øåëüôà íà ãëóáèíå îò 20 äî 300 ì. Äâà âèäà apparent transitional specimens were recorded. Argis ochotensis è Spirontocaris brevidigitata îòìå÷å- íû äëÿ çàïàäíîêàì÷àòñêîãî øåëüôà âïåðâûå, ïîñëå- ÐÅÇÞÌÅ: Ïîñëåäíÿÿ ïî âðåìåíè ñâîäêà äàííûõ äíèé âïåðâûå äëÿ Îõîòñêîãî ìîðÿ â öåëîì. Íà íî- î äåñÿòèíîãèõ ðàêîîáðàçíûõ Îõîòñêîãî ìîðÿ [Âè- âîì ìàòåðèàëå ïîêàçàíî, ÷òî êàê ýòîò ïîñëåäíèé íîãðàäîâ, 1947] âêëþ÷àåò 91 âèä è ïîäâèä. Îäíàêî âèä, òàê è Spirontocaris spinus intermedia õîðîøî ïî ñëîæèâøèìñÿ â òî âðåìÿ â ÑÑÑÐ óñëîâèÿì èññëå- îáîñîáëåíû îò Spirontocaris spinus, è íå ÿâëÿþòñÿ äîâàòåëè â áîëüøèíñòâå ñëó÷àåâ íå èìåëè âîçìîæ- åãî ñèíîíèìàìè, êàê ðàíåå ïðåäïîëàãàëîñü Hayashi íîñòè ïóáëèêîâàòü ñâåäåíèÿ î ïîëîæåíèè ñòàíöèé [1977]. Âñÿ ôàóíà äåêàïîä çàïàäíîêàì÷àòñêîãî øåëü- 104 V.I. Sokolov ôà âêëþ÷àåò 50 âèäîâ. Íàèáîëåå îáû÷íûìè âèäàìè distribution pattern of most important commercial spe- ðåãèîíà áûëè Chionoecets bairdi, Chionoecetes opilio, cies, e.g. blue king crab, Paralithodes platypus (Brandt, Paralithodes camtschaticus, Pagurus trigonocheirus, 1851), red king crab, and tanner crabs, Chionoecetes Labidochirus splendescens èHyas coarctatus alutaceus. bairdi Rathbun, 1902 and Chionocoetes opilio (O. Fab- Âñå ýòè âèäû êðîìå Ch. bairdi øèðîêî ðàñïðîñòðà- ricius, 1788) are out of the scope of this paper. íåíû â Îõîòñêîì ìîðå. P. camtschaticus è Ch. bairdi áûëè íàèáîëåå ìíîãî÷èñëåííû íà ìåëêîâîäüå. Materials and Methods Pandalus borealis eous è Chionoecetes opilio äîìèíè- ðîâàëî â òðàëîâûõ óëîâàõ íà ãëóáèíå îò 200 äî 300 Most of 6100 specimens of 32 species of Decapoda were ì. Äëÿ âñåõ îáíàðóæåííûõ âèäîâ ïðèâåäåíû äàííûå collected during the expedition of the Pacific Research Centre ïî èçìåí÷èâîñòè, ðàçìåðíîìó ñîñòàâó, âñòðå÷àåìî- for Marine Fisheries and oceanography (TINRO-Centre, Vladi- ñòè ÿéöåíîñíûõ ñàìîê. vostok) and the Russian Federal Institute for Marine Fisheries Äåòàëüíî èññëåäîâàíû âòîðè÷íûå ïîëîâûå ïðè- and Oceanology (VNIRO, Moscow) on board R/V Professor çíàêè Crangon communis äëÿ âûÿñíåíèÿ âîïðîñà, Levanidov in the southeastern part of the Sea of Okhotsk ÿâëÿåòñÿ ëè äàííûé âèä ïðîòåðàíäðè÷åñêèì ãåð- (51°10′54°00′N). Ninety eight stations at depth from 20 to ìàôðîäèòîì. Îñîáè ñ ïåðåõîäàìè îò ïðèçíàêîâ ñàì- 300 m, were sampled between July, 1 and 20 in 1996. Samples öîâ ê ïðèçíàêàì ñàìîê íå îáíàðóæåíû. were obtained by an otter-trawl (28 m flat bottom trawl) with a mesh size of 45 mm supplied with a panel of 30 mm mesh net lining the cod end, and additionally by a dredge. The Introduction dredge had a mesh size of 10 mm and a rectangular mouth opening (120x40cm). All hauls lasted 30 minutes. The sta- Studies on the decapod crustaceans in the Sea of tions are listed in the appendix. Okhotsk have a rather long history. The first account of All decapod specimens were measured and sexed. After the Decapoda from the North-western Pacific including that most of specimens of non-commercial species (about the Sea of Okhotsk was published by Brandt [1851]. 3300 animals) were preserved in buffered 10% seawater Important papers which contain description of new formalin solution and later transferred to 70% ethyl alcohol. species from the Sea of Okhotsk, regional faunistic The carapace length (CL), from the base of eyestalk to the records and updates are those by Brajnikov [1907], posterior mid-dorsal edge of carapace was measured to the Rathbun [1924, 1925, 1930, 1932], Kobjakova [1936, nearest 0.1 mm for the shrimps. The maximum carapace width 1935], Makarov [1938], McLaughlin [1974], Hayashi (CW) was measured to the nearest 1 mm for the crabs. The maximal shield length (SL) from the base of eyestalk to the [1977]. Up to now the most comprehensive review of the posterior mid-dorsal point was measured in the hermit crabs. decapod fauna of the Sea of Okhotsk was presented by Shrimp specimens were sexed by examination of the en- Vinogradov [1947] who listed 91 species and subspe- dopodite of the first two pair of pleopods. The position of cies. Due to restrictions which existed in the USSR prior gonopore was used for the sex determination of hermit crabs. to the 1990s, Vinogradovs publication could not con- Crab specimens were sexed by examination of the abdomen tain the data on stations positions [Ivanov, 1992]. Later, and first two pair of pleopods. All preserved specimens are considerable part of the station data was lost and this is deposited in the Zoological Museum of Moscow State Uni- the reason why distribution data for the Sea of Okhotsk versity (ZMMU). decapods require re-consideration. Bottom water temperature was measured with a deep-sea Within the Sea of Okhotsk, the West Kamchatka protected reversing thermometer and bathythermograph. shelf remains the most extensively studied area. A per- sistent attention to this waters is due to a very abundant List of Decapoda collected by R/V Prof. Le- local stock of red king crab, Paralithodes camtschaticus vanidov (Tilesius, 1815) heavily exploited in recent years. The papers by Vinogradov [1945, 1946, 1947, 1969], Rodin [1967, 1969, 1985], and Chekunova [1969] built up the Family Pandalidae Haworth, 1825 basis of recent studies on population structure, migra- Genus Pandalus Leach, 1814 tions and reproduction of red king crab on the West Pandalus borealis eous Makarov, 1935 Kamchatka shelf. Larval biology of several species was Pandalus goniurus Stimpson, 1860 treated by Makarov [1966]. Distribution and biology of Family Hippolytidae Bate, 1888 other species in this area have been poorly studied while Genus Eualus Thallwitz, 1892 recent investigations of non-commercial species are Eualus fabricii (Kröyer, 1841) totally lacking. Also special trawl surveys became rare Eualus macilentus (Kröyer, 1842) in the 1990s. A detailed benthic survey conducted by the Eualus pusiolus (Kröyer, 1841) expedition on R/V Professor Levanidov in July 1996 Genus Lebbeus White, 1847 brought an extensive material which extends our knowl- Lebbeus groenlandicus (Fabricius, 1775) edge of the decapod fauna in the region. Genus Spirontocaris Bate, 1888 The present study is focused at occurrence, distribu-