Tsarin shrimp na ruwan hoda na Arewa (Pandalus borealis) na cikin aji ne na crustacean. Yana da nau'in sanyi mai ruwa-ruwa wanda yake da mahimmancin kasuwanci.
Gidan mazaunin arewacin ruwan shrimp.
Pinkananan ruwan shrimp na Arewa suna rayuwa cikin zurfin mita 20 zuwa 1330. Sun tsaya a kan ƙasa mai laushi da laushi, a cikin ruwan teku tare da yanayin zafi daga 0 ° C zuwa + 14 ° C da gishirin 33-34. A zurfin har zuwa mita ɗari uku, gungu-gungu suna yin gungu.
Yada shrimp na ruwan hoda arewa.
Ana rarraba shrimp na ruwan hoda na Arewa a cikin Tekun Atlantika daga gabar New England, Kanada, gabar gabas (daga Newfoundland da Labrador) zuwa Kudu da Gabashin Greenland, Iceland. Suna zaune a cikin ruwan Svalbard da Norway. An samo shi a cikin Tekun Arewa har zuwa Tashar Ingilishi. Sun bazu a cikin ruwan Japan, a cikin Tekun Okhotsk, ta cikin Bering Strait da ke kudu da Arewacin Amurka. A Arewacin Pacific, ana samun su a cikin Tekun Bering.
Alamomin waje na ruwan shrimp na arewa.
Bishiyoyi masu ruwan hoda na Arewa sun dace da yin iyo a cikin ruwa. Yana da dogon jiki, ya matse a bayyane, wanda ya kunshi bangarori biyu - cephalothorax da ciki. Cephalothorax yana da tsayi, kusan tsawon rabin jiki. Akwai idanuwa ɗaya a cikin ɓacin rai na dogon hanci. Idanun suna da rikitarwa kuma sun ƙunshi fuskoki da yawa masu sauƙi, yawan su yana ƙaruwa yayin da shrimp ke girma. Ganin shrimp yana da ado, tare da hoton abu wanda ake hada shi da hotuna daban-daban waɗanda suka bayyana akan kowane bangare daban. Irin wannan hangen nesan da ke kewaye da duniya bai fito fili ba kuma mara ma'ana.
Babban kwalliyar chitinous kariya ce tabbatacciya ga gill; a ƙasan ta zama sirara.
Tsarin ruwan hoda na Arewa yana da nau'i-nau'i 19 na gabobin jiki. Ayyukansu sun bambanta: eriya suna da gabobin taɓawa masu mahimmanci. Manbiji suna nika abinci, muƙamuƙi suna riƙe ganima. Dogayen hannaye, sanye take da ƙananan ƙusoshin hannu, an daidaita su don tsabtace jiki da gill daga ƙazantawa da ɗakunan ajiya. Sauran gabobin jiki suna yin aikin mota, sune mafi tsawo da karfi. Legsafafun ciki suna taimakawa wajen iyo, amma a cikin wasu jatan lande sun rikide sun zama kayan maye (na maza), a mata suna hidimar ɗaukar ƙwai.
Abubuwan halaye na halaye na ruwan hoda na arewa.
Manyan bishiyoyi masu ruwan hoda a cikin ruwa a hankali suna taɓa gabobinsu, irin waɗannan motsin ba kamar iyo bane. Firgitsi masu saƙwan fata suna yin tsalle da sauri tare da taimakon lanƙwasa mai kaifi mai ƙarfi. Wannan motsawar yana da muhimmiyar kariya daga harin maharan. Bugu da ƙari, shrimps suna yin tsalle ne kawai don baya, saboda haka yana da sauƙi a kama su idan kun kawo raga daga baya, kuma kuna ƙoƙarin kama ta daga gaba. A wannan yanayin, jatan lande ya hau kan yanar gizo da kansa ba tare da lalata jiki ba.
Sake haifuwa na ruwan hoda arewa.
Arewacin ruwan hoda shrimp kwayoyin halitta ne. Sunan hermaphrodites ne na yau da kullun kuma suna canza jima'i yayin kusan shekaru huɗu. Bayan kammala ci gaban larval, lokacin da shrimps ke da shekaru 1.5, maza ne. Sannan akwai canjin jima'i kuma shrimp yana hayayyafa kamar mata. Suna haɗa ƙwan da aka sa a ƙafafun ciki waɗanda ke kan ciki.
Ci gaba a arewacin ruwan hoda shrimp yana faruwa kai tsaye ko tare da canji, a wannan yanayin tsutsa ta fito.
Nau'in larval na farko ana kiransa nauplius; ana rarrabe su da kasancewar gabbai da gaɓoɓi uku da ido ɗaya da ƙwayoyi uku suka kafa. Nau'i na biyu - protozoa yana da jela da matakai guda biyu (ɗayan yana kama da baki, na biyu yana cikin ƙaya). Tare da ci gaba kai tsaye, ƙaramin ɓawon burodi nan da nan ya fito daga ƙwai. Mata na ɗaukar zuriya na tsawon watanni 4-10. Tsutsa tsutsa suna yin iyo na wani lokaci a zurfin zurfin. Bayan watanni 1-2 sun nitse zuwa ƙasa, sun riga sun zama ƙananan jatan lande, kuma suna girma da sauri. Molt yana faruwa lokaci-lokaci a cikin ɓawon burodi. A wannan lokacin, ana maye gurbin tsohuwar murfin chitinous mai rufi mai laushi mai laushi, wanda sauƙin miƙa shi kawai bayan narkar da shi.
Sannan yana yin tauri da kare taushi jikin katanga. Yayinda crustacean ke tsiro, harsashi a hankali ya zama ƙarami, kuma murfin ɗan gajeren ya sake canzawa. Yayin narkakken narkakkiyar ruwan shrimp, arewacin ta zama mai rauni musamman kuma sun kasance ganima ga kwayoyin halittar ruwa da yawa. Pinkanyen shrimp na arewacin suna rayuwa a cikin teku kusan shekaru 8, suna kai tsawon jiki na 12.0 -16.5 cm.
Ciyar da rimaukar Pink ta Arewa.
Kayataccen ruwan shrimp na Arewa yana ciyar da detritus, matattun shuke-shuke na ruwa, tsutsotsi, kwari, da daphnia. Suna cin gawarwakin matattun dabbobi. Sau da yawa suna taruwa a cikin manyan garken dab da kamun kifi kuma suna cin kifin da aka makala a cikin raga.
Darajar kasuwanci ta arewacin ruwan shrimp.
An shirya katanga mai ruwan hoda ta Arewa da yawa, tare da kamun kamala na tan miliyan da yawa shekara-shekara. Musamman mahimmin kifi ana aiwatar da shi a yankin ruwa na Tekun Barents. Babban kasuwancin kasuwancin jatan lande suna cikin yankunan dake arewa maso gabashin tsibirin Victoria.
Hannun jarirai a cikin Tekun Barents kusan tan dubu 400-500 ne.
Hakanan ana samun kifin shrimp na arewacin kasuwanci a yammacin Atlantic da North Atlantic, tare da manyan filayen kamun kifi kusa da Greenland kuma yanzu ana kama su zuwa kudu sosai a Tekun St. Lawrence, Gulf of Fundy da Gulf of Maine. Akwai kamun kifi mai yawa a cikin yankin Iceland da gefen tekun Norway. Yankin ruwan hoda na Arewa sunkai 80 zuwa 90% na kamun da aka yi a yammacin gabar Kamchatka, Tekun Bering da Tekun Alaska. Irin wannan irin jatan lande ana kifi a Koriya, Amurka, Kanada.
Barazana ga Shittin Pink na Arewa.
Arewacin ruwan hoda shrimp masunta yana buƙatar sasantawa ta duniya. Kwanan nan, kamun katanga ya rage sau 5. Bugu da kari, lokuta da yawa na kama-kama da kodin na yara sun zama mafi yawa yayin kamun kifi.
A halin yanzu, jiragen ruwan Rasha da na Norway suna kamun kifi a cikin yankin Spitsbergen a ƙarƙashin lasisi na musamman wanda ke tsara yawan kwanakin tasiri da yawan jiragen ruwa.
Hakanan, mafi girman girman raga shine 35 mm. Domin takaita kamun, rufe wuraren masunta na wani dan lokaci inda ake kama haddock, cod, black halibut da redfish.
Ana kula da kamun kifin a cikin yankin kariya na masunta a kusa da Svalbard yayin da damuwa ta taso cewa kayan hawan ruwan hoda na arewacin na iya ƙarewa. An ba kowace ƙasa takamaiman ranakun kamun kifi. Matsakaicin adadin kwanakin da aka kwashe a kamun kifi ya ragu da kashi 30%.
