Results 191 to 200 of about 7,023 (229)

Osteichthyes: Immune Systems of Teleosts (Actinopterygii)

2018
Teleosts and elasmobranchs are the lowest vertebrates that possess adaptive immunity akin to mammalian ones. However, the fish immune system is different from that of mammals, that is, a lack of bone marrow, lymph nodes and germinal center. Their immune system is also characterized by the fact that their surface is covered by live cells with mucus in ...
Teruyuki Nakanishi, Jun-ichi Hikima, Takashi Yada   +2 more
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Denticles in fossil Actinopterygii.

Journal of Cell Science, 1942
ABSTRACT It has long been known that true denticles, as opposed to mere ridges, tubercles, or spines of the outer ganoine layer may occur on the exposed surface of the scales and dermal bones of living Actinopterygii such as Poly pt er us orLepidosteus.
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ACTINOPTERYGII, Strahl(en) flosser

2010
Die Actinopterygii bilden den uberwiegenden Teil der rezenten Fischfauna, wah rend die Fischformen der Sarcopterygii (S. 307) heute nur noch mit wenigen Arten der Dipnoi (Lungenfische) (S. 309) und Actinistia (Hohlstachler) (S. 315) vertreten sind. Der Name „Strahlflosser“ bezieht sich auf die strahlenformig angeordneten Lepidotrichia, die die Flossen ...
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Bioecology of Electric Fish (Actinopterygii: Gymnotiformes)

Middle East Research Journal of Biological Sciences
The poraquê has an elongated and cylindrical body, with just one anal fin, which extends across almost the entire abdomen it resembles the shape of an eel. Its head is flat and its mouth is equipped with a row of sharp, conical teeth. The color of this animal is always very dark, but the ventral part of the body is yellowish and they have poor vision ...
Carlos Henrique Marchiori, Marco Vinícios de Oliveira Santana, Klebert de Paula Malheiros   +2 more
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Die Bauchschuppen vonMoythomasia nitida Gross (Pisces, Actinopterygii)

Paläontologische Zeitschrift, 1972
In einem Versuch, die Orientierung der Bauchschuppen-Schragreihen bei dem devonischen PalaeoniscoidenMoythomasia nitida zu klaren, werden drei verwendbare Exemplare dieser Form des Actinopterygiermaterials aus dem Plattenkalk der Paffrather Mulde angefuhrt. Bei diesen ziehen samtliche Bauchschuppenreihen zwischen Brustflossen und Analflosse nach antero-
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?????????????????? ???????? (Teleostei, Actinopterygii) ???????????????? ?????????????? ?? ???????????????? ???? ?????????????????????????????? ?????????????? ?????????????? (??????????????)

2019
???? ???????? ?????????????????????????????? ?????????????????????? ???????????????????????? ???????? ???????????????????? ?????????????? ???????????????????????????? 20 ??????????, ?????????????????????? ?? 14 ??????????, 4 ???????????????????? 4 ?????????????? (Cypriniformes, Siluriformes, Esociformes, Perciformes). ???? ?????????????????? ???????????
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?????????????? ?????? ???????? Perca (Actinopterygii, Percidae) ???? ?????????????????? ???????????????? ?????????????? ?????? ?????????????????? ????????????

2019
???????????? ???????????????????? ?????????????????????? ???????????????? ???????????????? ???????????? ???????????? ???? ?????????????????? ???????????????? ?????????????? ?? ???????????????? ???????????? ?????????????? ????????????. ???????????? Perca sp. ?????????????????? ?? ???????????????????? ???? ??????????????????????????????, ?????????????????
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Revision of the family Samaridae (Pleuronectiformes: Actinopterygii).

2009
The family Samaridae has 28 nominal species or subspecies, 22 of which are recognized in this study. Four new species (Samariscus sp., Samaris sp., Samaris sp. 1 and S. sp. 2) are described, two species names resurrected (S. cacatuae and S. onatus) and two species (S. filipectoralis and S.
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?????????????????????? ?????????????????? ???????????? ?????????? Stizostedion volgensis (Actinopterygii, Percidae) ?? ??????????????: ??????????-?????????????????????????? ???????????????????????????? ?? ????????????

2014
?????????? ???????? ???? ?????????????? ???????????? ???????????? ?? ?????????????????????? ??????????????????????????, ?????? ??????????????????????. ???????? ?????????????????????? ???????????? ??????????????????. ???? ???????????????????? ?? ???????????????? ???????????? ?? ????????????????????, ?????????????????? ?? ???????????? ????????????????????
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Evoluce pohlavních chromozómů u paprskoploutvých ryb (Actinopterygii)

2020
Ray-finned fishes (Actinopterygii) possess strikingly diverse sex sex differentiation strategies (including gonochorism, unisexuality and several types of hermaphroditism) and mechanisms of sex determination (both environmental and genetic), including frequent turnovers between abovementioned strategies and mechanisms.
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