Results 51 to 60 of about 262 (134)

Effect of pozzolanic cement exposure in nile tilapia (Oreochromis niloticus) [PDF]

open access: yes
Cement used in structures such as bridges, dams, and retaining walls built on the aquatic ecosystem harms different organisms. The current study reveals the effect of pozzolanic cement (PC) on Nile Tilapia (Oreochromis niloticus).
Er, Akif, Kayış, Şevki, Minaz, Mert
core   +1 more source

Influence of Temperature on the Embryonic Development of the Pond Smelt, Hypomesus olidus PALLAS

open access: yesNIPPON SUISAN GAKKAISHI, 1937
Four days after the artificial fertilization eggs of the pond smelt, Hypomesus olidus PALLAS, were puttin 20 rials with water. Two of them were then placed in each of 10 compartments (Nos. 1-10) of a SENO-TAUTI'S serial incubator. They ran at temperatures differing from each other by nearly 1•5 degrees, No. 1 at the highest (19•9C) and No.
openaire   +2 more sources

Molecular phylogenetics and evolution in sharks and fishes [PDF]

open access: yes, 2003
The field of phylogenetic systematics has benefited greatly from advances in the theory that links the variation among organisms to the evolutionary relationships among the biological lineages to which those organisms belong, and from advances in ...
López, Juan Andrés
core   +2 more sources

Description and identification of larval fishes in Alaskan freshwaters [PDF]

open access: yes, 1988
Thesis (M.S.) University of Alaska Fairbanks, 1988Identification of larval fish is important for assessing fish populations and human impact on fish ecosystems but is difficult due to subtle differences between larvae of different species.
Sturm, Elizabeth Anne
core  

Salmoniform fishes [PDF]

open access: yes, 1974
p. 267-325 : ill., maps ; 27 cm.Includes bibliographical references (p. 323-325)."The affinities of the tiny, freshwater Australian fish Lepidogalaxias salamandroides have remained uncertain since its original description in 1961.
Rosen, Donn Eric, 1929-
core  

Non-native fish of the Upper Irtysh and the Ulungur Rivers in China. [PDF]

open access: yesBiodivers Data J, 2023
Tian C   +7 more
europepmc   +1 more source

Some aspects of the comparative ecology of fishes associated with juvenile sockeye salmon, Oncorhynchus nerka (Walbaum), in the lakes of the Naknek river system, Alaska [PDF]

open access: yes
A study of the distribution, relative abundance and diet of fishes sympatric with juvenile sockeye salmon, Oncorhynchus nerka (Walbaum), within the freshwater nursery areas of the Naknek River system was undertaken from 1961 to 1963.
Wallace, Richard L.
core   +1 more source

Proposed Environmental Quality Standards for Phenol in Water [PDF]

open access: yes, 1995
This is the Proposed Environmental Quality Standards (EQS) for Phenol in Water prepared for the National Rivers Authority, and published by the Environment Agency in 1995.
Comber, S.   +4 more
core  

Laboratory guide to early life history stages of northeast Pacific fishes [PDF]

open access: yes, 1989
This laboratory guide presents taxonomic information on eggs and larvae of fishes of the Northeast Pacific Ocean (north of California) and the eastern Bering Sea. Included are early-life-history series, illustrations, and comparative descriptions of 232
Blood, Deborah M.   +3 more
core  

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