Marine Biology: An Ecological Approach |
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Page 102
... Tuna , Albacore ( Thunnus alalunga ) , Big - Eye Tuna ( Thunnus obesus ) , and Yellowfin Tuna ( Thunnus albacares ) Age years Species 1 2 3 4 5 6 7 8 Length , cm T. alalunga T. obesus T. albacares 18-66 45-50 54-103 After N. V. Parin ...
... Tuna , Albacore ( Thunnus alalunga ) , Big - Eye Tuna ( Thunnus obesus ) , and Yellowfin Tuna ( Thunnus albacares ) Age years Species 1 2 3 4 5 6 7 8 Length , cm T. alalunga T. obesus T. albacares 18-66 45-50 54-103 After N. V. Parin ...
Page 107
... tunas usually enter these waters in the summer when surface temperatures reach 20-21 ° C . If the year is cold and temperatures of the surface waters do not rise to this point , the tunas are absent . However , the Atlantic bluefin tuna ...
... tunas usually enter these waters in the summer when surface temperatures reach 20-21 ° C . If the year is cold and temperatures of the surface waters do not rise to this point , the tunas are absent . However , the Atlantic bluefin tuna ...
Page 116
... Tunas have been intensively studied and their food is extremely varied , with as many as 180 different food items reported for striped tuna ( Katsuwonus pelamis ) . Part of this varied diet is due to the great areas over which they move ...
... Tunas have been intensively studied and their food is extremely varied , with as many as 180 different food items reported for striped tuna ( Katsuwonus pelamis ) . Part of this varied diet is due to the great areas over which they move ...
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Common terms and phrases
abundant adaptations algae algal amount amphipods anemones areas Atlantic bacteria barnacles benthic biology body bottom burrow carnivores changes Cnidaria communities competition copepods coral reef crabs crustaceans deep sea density deposit feeders depth desiccation detritus diatoms dinoflagellates dominant ecology ecosystems eggs epipelagic estuary fauna feeding Figure fishes fresh water grazing hence herbivores increased invertebrates kelp kelp beds large numbers larvae layers levels light living low tide major marine mammals marsh mesopelagic migrate mollusks Mytilus nekton number of species numbers nutrients occur ocean oxygen Pacific coast particles patterns pelagic percent Photo courtesy photophores photosynthesis physical factors phytoplankton plankton plants Plate polychaete population predators primary productivity reduced result rocky shores salinity salt sand beaches sea grass sea urchins sea water sediment shallow water squids substrate surface waters suspension feeders temperate temperature terrestrial thermocline tropical tuna upper various vertical water column water mass wave action whales zonation zone zooplankton zooxanthellae