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Behavior in an ‘intermediate’ population of the subterranean-dwelling characid Astyanax fasciatus
Springer Science and Business Media LLC - Tập 10 - Trang 203-207 - 1984
A population of the characid Astyanax fasciatus was found living at the outflow of a subterranean source of water. Field observations revealed differences in behavior when compared with river populations. Affinity of this fish for the subterranean cavity was evidenced by behavior and distribution of individuals. Fish almost always carried bait into the subterranean cavity prior to feeding and also...... hiện toàn bộ
The Role of Learning in the Aggressive and Reproductive Behavior of Blue Gouramis, Trichogaster trichopterus
Springer Science and Business Media LLC - Tập 54 - Trang 355-369 - 1999
Like countless other vertebrates and even many invertebrates, blue gouramis, Trichogaster trichopterus, a freshwater tropical fish, can learn to associate environmental cues with the appearance of biologically important events. Research with blue gouramis reveals that this capacity for learning, which psychologists call Pavlovian conditioning, provides the means to enhance their territorial defens...... hiện toàn bộ
A modified decalcification technique for enhancing growth bands in deep-coned vertebrae of elasmobranchs
Springer Science and Business Media LLC - Tập 50 - Trang 225-230 - 1997
A technique for enhancing growth bands on vertebrae was assayed using 477 centra from blackmouth catsharks, Galeus melastomus. Specimens were caught at depths between 200 and 800 meters off the southern Portuguese coast (Algarve) during an IPIMAR research cruise in August 1994. Total lengths ranged from 12 to 71 cm. Standard vertebral ageing techniques, such as silver nitrate impregnation, haemato...... hiện toàn bộ
Non-visual feeding behavior of the mottled sculpin, Cottus bairdi, in Lake Michigan
Springer Science and Business Media LLC - Tập 12 - Trang 111-117 - 1985
Field and laboratory experiments indicate that the mottled sculpin, Cottus bairdi, feed in the dark. Blinded sculpins feed on a variety of motile prey in the laboratory and show stereotyped responses to prey stimuli. The sculpins bite at moving inert objects, even if buried in substratum, indicating that they use their lateral line system to detect prey. Covering portions of the lateral line with ...... hiện toàn bộ
Isolation and identification of anti-inflammatory compounds from ethyl acetate fraction of Ecklonia stolonifera and their anti-inflammatory action
Springer Science and Business Media LLC - - 2016
Use of fragmented reservoir habitats by larval fish assemblages across years with contrasting hydrological conditions
Springer Science and Business Media LLC - Tập 102 - Trang 857-871 - 2019
Sedimentation in aging reservoirs generally reduces fish habitat quality and quantity, often isolating coves and pools from the main body of the reservoir. In some cases, however, habitat fragments created by sediment deposition in the river-reservoir interface zone support high fish diversity, and they could potentially replicate features of nursery habitats in natural river floodplains if they a...... hiện toàn bộ
Intraspecific variation in sand-diving and predator avoidance behavior of green razorfish,Xyrichtys splendens (Pisces, Labridae): effect on courtship and mating success
Springer Science and Business Media LLC - Tập 41 - Trang 403-414 - 1994
Green razorfish are Caribbean wrasses that live in harems on shallow sand or seagrass beds, which offer little cover for predator avoidance (PA). Field observations showed that non-conspecific fishes that intruded were either attacked, ignored, or actively avoided. Food competitors and small piscivores were attacked by male razorfish. Razorfish PA behaviors varied among three habitats with differe...... hiện toàn bộ
Tảo và Bioguano như nguồn phân bón hữu cơ đầy hứa hẹn Dịch bởi AI
Springer Science and Business Media LLC - Tập 32 - Trang 3971-3981 - 2020
Sự gia tăng dân số dự kiến dẫn đến nhu cầu thực phẩm tăng cao, ảnh hưởng nghiêm trọng đến tài nguyên thiên nhiên của Trái đất. Cải thiện năng suất cây trồng mà không làm ảnh hưởng đến môi trường sẽ là một trong những thách thức chính trong các thập kỷ tới. Trong số các biện pháp có thể thúc đẩy nông nghiệp bền vững, phân bón hữu cơ, đặc biệt là tảo, đang nhận được sự chú ý ngày càng tăng. Mục tiêu...... hiện toàn bộ
#phân bón hữu cơ #tảo lớn #Bioguano #sản xuất nông nghiệp bền vững
Antioxidant activity of Sargassum polycystum (Phaeophyta) and Laurencia obtusa (Rhodophyta) from Seribu Islands
Springer Science and Business Media LLC - - 1997
Fresh and dry specimens of Sargassum polycystum and Laurencia obtusa were collected from the Seribu Islands waters, Indonesia, and crude methanol, diethylether and hexane extracts were tested for antioxidant activity using the thiocyanate method. None of the extracts of dry S. polycystum and L. obtusa showed antioxidant activity, but extracts of fresh material did show activity. L. obtusa extracts...... hiện toàn bộ
Response of Tetraselmis suecica to nutrient and grazer manipulation
Springer Science and Business Media LLC - Tập 11 - Trang 481-485 - 1999
Three methods of algal quantification (direct cell counts, chlorophyll a extraction, in vivo fluorescence) were used to evaluate the response of the unicellular green flagellate Tetraselmis suecica to nutrients and grazers. Nutrient enrichment enhanced total cell counts, chlorophyll a concentration and in vivo and DCMU-fluorescence. Photosynthetic efficiency was reduced in the complete F2 medium a...... hiện toàn bộ
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