6 results match your criteria Acta Zoologica[Journal]

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The cnidome and internal morphology of (Linnaeus, 1758) (Cnidaria, Anthozoa).

Acta Zool 2017 Apr 21;98(2):191-213. Epub 2016 Jun 21.

Evolutionary Biology Centre Uppsala University Norbyvägen 18 A SE-752 36 Uppsala Sweden.

The cnidome of the scleractinian cold-water coral (Linnaeus, 1758, syn. ) was described by Carlgren in 1940. Due to a renewed interest in the cnidae of specifically comparisons of adult and larval cnidae and their functions, we now redescribe the cnidome from material collected at the Tisler reef in Norway, close to Carlgren's collection site at Saekken (Sweden). Read More

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Anatomy and histochemistry of spread-wing posture inbirds. 4. Eagles soar with fast, not slow muscle fibres.

Acta Zool 2016 Jul 17;97(3):319-324. Epub 2015 Mar 17.

Department of Zoology, Weber State University, Ogden UT 84408-2505 USA.

Slow fibers are typically characterized as functioning in avian postural behaviors such as soaring flight, and are described for a number of elite soarers such as vultures, pelicans and albatrosses. Golden Eagles and Bald Eagles also display soaring behavior and we examined their flight muscles for the presence of slow fibers. Surprisingly, eagles lack a deep layer to the pectoralis found in other soaring species. Read More

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Locomotion pattern and trunk musculoskeletal architecture among Urodela.

Acta Zool 2015 Apr 10;96(2):225-235. Epub 2014 Feb 10.

The University Museum, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.

We comparatively examined the trunk musculature and prezygapophyseal angle of mid-trunk vertebra in eight urodele species with different locomotive modes (aquatic , , and ; semi-aquatic ; and terrestrial , and ). We found that the more terrestrial species were characterized by larger dorsal and abdominal muscle weight ratios compared with those of the more aquatic species, whereas muscle ratios of the lateral hypaxial musculature were larger in the more aquatic species. The lateral hypaxial muscles were thicker in the more aquatic species, whereas the was more differentiated in the more terrestrial species. Read More

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Development of ciliary bands in larvae of the living isocrinid sea lily

Acta Zool 2015 Jan 17;96(1):36-43. Epub 2013 Oct 17.

Marine and Coastal Research Center, Ochanomizu University Ko-yatsu, Tateyama, Chiba, 294-0301, Japan.

Embryos and larvae of an isocrinid sea lily, , are described by scanning electron microscopy. Around hatching (35 h after fertilization), the outer surface of the gastrula becomes ubiquitously covered with short cilia. At 40 h, the hatched swimming embryo develops a cilia-free zone of ectoderm on the ventral side. Read More

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January 2015

Evolving possibilities: Post-embryonic axial elongation in salamanders with biphasic (, , ) and paedomorphic life cycles ( and ). Submitted Acta Zoologica.

Acta Zool 2012 Jan;93(1):2-13

DePauw University, Department of Biology, 1 E Hanna Street, Greencastle Indiana 46135.

Typically the number of vertebrae an organism will have post-embryonically is determined during embryogenesis via the development of paired somites. Our research investigates the phenomenon of vertebral addition in salamander tails. We describe body and tail growth, and patterns of postsacral vertebral addition and elongation in context with caudal morphology for four plethodontids (), and one ambystomatid. Read More

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January 2012

Hair cell orientation patterns on the saccules of juvenile and adult toadfish, Opsanus tau.

Acta Zool 1995 Oct;76(4):257-65

Department of Zoology, University of Maryland, College Park 20742, USA.

Saccules from 10 adult (five female, five male) toadfish (Opsanus tau) 13.5-26 cm standard length, were examined for individual/sexual variation in the hair cell orientation pattern. In addition, saccules from two juveniles (5 and 6 cm standard length) were compared with those of the adults to determine whether maturational differences exist in the hair cell orientations. Read More

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October 1995
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