The bureau said that Motor Spirit valued at N58.3 billion, Gas oil valued at N29.95 billion, Herrings (Clupea harengus, Clupea pallasii
) valued at N6.2 billion, and Mackerel at five billion nairas were among imports from the Netherlands during the quarter.
Both cormorant species feed primarily on small forage fish, such as Pacific Herring (Clupea pallasii
), Pacific salmon (Oncorhynchus spp), Pacific Sandlance (Ammodytes hexapterus), and gunnels (Pholidae) (Robertson 1974; Sullivan 1998), with Double-crested Cormorants favouring schooling fish while Pelagic Cormorants prefer solitary prey concealed in rocky substrates (Ainley and others 1981).
Fish were fed 3 times per week during the first year and twice per week during the second year with a gel food consisting of gelatin, vitamins, amino acid supplements, krill (Euphausia superba), pelleted food, Pacific herring (Clupea pallasii
), and squid.
Testicular development and serum profiles of steroid hormone levels in captive male Pacific herring Clupea pallasii
during their first maturational cycle.
Other prey species from the stomach obtained in Yakutat are surf smelt, Hypomesus pretiosus; eulachon, Thaleichthys pacificus; and Pacific herring, Clupea pallasii
Sperm-activating proteins from unfertilized eggs of the Pacific herring Clupea pallasii
Several species were not captured in ponds (e.g., threadfin shad, Dorosoma petenense; common carp, Cyprinus carpio; Sacramento sucker, Catostomus occidentalis; longfin smelt, Spirinchus thaleichthys; and shimofuri goby, Tridentiger bifasciatus), whereas other species were not captured in sloughs (e.g., Pacific herring, Clupea pallasii
; and bay pipefish, Syngnathus leptorhynchus).
The species identified above 10% FO included North Pacific Hake (Merluccius productus), Pacific Herring (Clupea pallasii
), and Shiner Perch (Cymatogaster aggregata) (Table 3).
Ageing and back-calculating growth rates of Pacific herring, Clupea pallasii
, larvae by reading daily otolith increments.
Techniques are demonstrated with two examples from Alaska, one on Pacific herring (Clupea pallasii
)-baleen whale dynamics and one on strategic research planning for Chinook salmon (Oncorhynchus tshawytscha).
Contribution to the biology of the Pacific herring, Clupea pallasii
and the condition of the fishery in Alaska.
Number of Species specimens Order Clupeiformes (0.1%) Pacific herring (Clupea pallasii
) 1 Order Salmoniformes (6.8%) Arctic cisco (Coregonus autumnalis) * 15 Sheefish (Stenodus leucichthys) * 1 Arctic grayling (Thymallus arcticus) * 4 Arctic char (Salvelinus alpinus) * 21(1) Lake trout (Salvelinus namaycush) 6 Order Osmeriformes (0.1%) Capelin (Mallotus villosus) 0(1) Order Gadiformes (2.3%) Polar cod (Arctogadus glacialis) * 3 Arctic cod (Boreogadus saida) * 11(1) Greenland cod (Gadus ogac) * 1 Order Gasterosteiformes (37.8%) Ninespine stickleback (Pungitius pungitius) * 260(4) Order Scorpaeniformes (52.2%) Whitespotted greenling (Hexagrammos stelleri) 1 Threaded sculpin (Gymnocanthus pistilliger) * 1(1) Arctic staghorn sculpin (Gymnocanthus tricuspis) * 2 Myoxocephalus sp.