Diversity of Fish Fauna in Gediz Estuary Lagoons (Izmir Bay/Aegean Sea).

Journal of Animal and Veterinary Advances 7 (9):1146-1150). ISSN: 1680-5593.

Abstract:

In order to establish the present fish fauna in Gediz estuary lagoons, sampling was conducted in the 4 stations, one inside Gediz river mouth and 3 in the lagoons during 2004. In the first station, a commercial trawling with 44 mm codend mesh size to determine fish fauna was used and sub marine observations or beach seine of 1 mm mesh size employed to establish fish fauna in the lagoons, K rdeniz, Homa and Çilazmak, which are relatively shallow. In addition some physicochemical parameters such as temperature, salinity, dissolved oxygen, pH and chlorophyl-a which all play significant roles were measured for each stations monthly. As the result of the research, 56 fish species of 24 families were found from the 4 stations. According to a Bray-Curtis similarity index and multi dimensional scaling analysis in relation to the lagoons, 2 groups are formed based on diversity of fish fauna; Krdeniz, Homa and Çilazmak are similar to one another in diversity of species, with the first station being different from them.

bayan-biblio

Freigegeben in B

Distribution and current status of herpetofauna in the Gediz Delta (Western Anatolia, Turkey).

Herpetology Notes 11: 1-15 (2018) (published online on 10 January 2018)

Abstract:

In  this study, we conducted an inventory of amphibians and reptiles between 2013 and 2016 in the Gediz Delta (İzmir, Turkey). The field results were combined with existing records. According to the data obtained, a total of 35 herptile species live in the region, comprising 7 amphibians  (2 urodeles, 5  anurans) and 28  reptiles (6 chelonians,  10 lizards and  12 snakes). Five species (Lissotriton vulgaris, Triturus ivanbureschi, Heremites auratus, Platyceps collaris and Telecopus fallax) were recorded  for the first time in the Gediz Delta during the study. A chorotype  classification and potential threats of the species are also presented.

arslan-biblio

Freigegeben in A

Gene flow between insular, coastal and interior populations of brown bears in Alaska.

Molecular Ecology  7(10): 1283-1292. https://doi.org/10.1046/j.1365-294x.1998.00440.x

Abstract:

The brown bears of coastal Alaska have been recently regarded as comprising from one to three distinct genetic groups. We sampled brown bears from each of the regions for which hypotheses of genetic uniqueness have been made, including the bears of the Kodiak Archipelago and the bears of Admiralty, Baranof and Chichagof (ABC) Islands in southeast Alaska. These samples were analysed with a suite of nuclear microsatellite markers. The ‘big brown bears’ of coastal Alaska were found to be part of the continuous continental distribution of brown bears, and not genetically isolated from the physically smaller ‘grizzly bears’ of the interior. By contrast, Kodiak brown bears appear to have experienced little or no genetic exchange with continental populations in recent generations. The bears of the ABC Islands, which have previously been shown to undergo little or no female‐mediated gene flow with mainland populations, were found not to be genetically isolated from mainland bears. The data from the four insular populations indicate that female and male dispersal can be reduced or eliminated by water barriers of 2–4 km and 7km in width, respectively.

paetkau-biblio

Freigegeben in P
Mittwoch, 28 April 2021 15:58

RUPPELL, J. C. (2010)

Vocal Diversity and Taxonomy of Nomascus in Central Vietnam and Southern Laos.

International Journal of Primatology 31: 73–94.

Abstract:

Previous researchers suggested that gibbon song repertoire is genetically determined and song characteristics are useful for assessing systematic relationships. The southern white-cheeked crested gibbon is regarded as either a subspecies of Nomascus leucogenys or its own species (Nomascus siki). I studied vocal diversity among different wild populations of Nomascus in central Vietnam and southern Laos to assess their taxonomic relationships and to examine whether their vocal patterns correspond to forms previously described for Nomascus siki. I examined the songs of 7 Nomascus populations in Vietnam and Laos. I analyzed 192 song bouts from different gibbon groups including 173 phrases of 42 females and 192 phrases of 42 males. Linear discriminant analysis, classification trees, and multidimensional scaling revealed marked separation of groups in the northern and southern populations. Within the 2 geographic populations, there is little variability and the vocal characteristics exhibited no apparent cline. I conclude that the northern and southern geographic populations may represent 2 distinct taxa. I postulate that a taxonal boundary such as large rivers existing between southern Quang Binh province and northern Thua-Thien Hue province in Vietnam and northern Phou Xang He NBCA and southern Dong Phou Vieng NBCA in Laos has limited gene flow between the populations. Differing topographic features could also serve as a selective force for improved sound transmission in a highly territorial species, driving the divergence between the 2 populations.

ruppell-biblio

Freigegeben in R

Phylogenetic relationships of Mesoamerican spider monkeys (Ateles geoffroyi): Molecular evidence suggests the need for a revised taxonomy.

Molecular Phylogenetics and Evolution 82: 484-494.

Abstract:

Mesoamerican spider monkeys (Ateles geoffroyi sensu lato) are widely distributed from Mexico to northern Colombia. This group of primates includes many allopatric forms with morphologically distinct pelage color and patterning, but its taxonomy and phylogenetic history are poorly understood. We explored the genetic relationships among the different forms of Mesoamerican spider monkeys using mtDNA sequence data, and we offer a new hypothesis for the evolutionary history of the group. We collected up to ~800 bp of DNA sequence data from hypervariable region 1 (HV1) of the control region, or D-loop, of the mitochondrion for multiple putative subspecies of Ateles geoffroyi sensu lato. Both maximum likelihood and Bayesian reconstructions, using Ateles paniscus as an outgroup, showed that (1) A. fusciceps and A. geoffroyi form two different monophyletic groups and (2) currently recognized subspecies of A. geoffroyi are not monophyletic. Within A. geoffroyi, our phylogenetic analysis revealed little concordance between any of the classifications proposed for this taxon and their phylogenetic relationships, therefore a new classification is needed for this group. Several possible clades with recent divergence times (1.7–0.8 Ma) were identified within Ateles geoffroyi sensu lato. Some previously recognized taxa were not separated by our data (e.g., A. g. vellerosus and A. g. yucatanensis), while one distinct clade had never been described as a different evolutionary unit based on pelage or geography (Ateles geoffroyi ssp. indet. from El Salvador). Based on well-supported phylogenetic relationships, our results challenge previous taxonomic arrangements for Mesoamerican spider monkeys. We suggest a revised arrangement based on our data and call for a thorough taxonomic revision of this group.

morales-biblio

Freigegeben in M
Dienstag, 20 April 2021 05:50

GRAF, R. & FISCHER, C. (2021)

Atlas der Säugetiere Schweiz und Liechtenstein.

488 Seiten, durchgehend farbig illustriert mit rund 420 Fotos, 120 Karten und 160 Diagrammen.
Hrsg.: Schweizerische Gesellschaft für Wildtierbiologie (SGW)
Haupt Verlag, Bern.1. Auflage.  ISBN: 978-3-258-08178-6

Beschreibung:

Dieses große Werk beruht auf jahrelanger Vorarbeit: alle Säugetierarten der Schweiz und Liechtensteins.Wissenschaftlich fundierte Artporträts zu allen 99 wildlebenden Arten mit zahlreichen Fotos und einer topaktuellen Verbreitungskarte.Herausgegeben von der Schweizerischen Gesellschaft für Wildtierbiologie.99 wildlebende Säugetierarten kommen aktuell In der Schweiz und in Liechtenstein vor. Der «Atlas der Säugetiere Schweiz und Liechtenstein» porträtiert diese gemäß dem wissenschaftlich aktuellen Wissensstand. Die Artporträts umfassen neben allgemein verständlichen Texten zur Biologie, Verbreitung, zu den Ansprüchen an den Lebensraum sowie zum Schutz und zum Managementstatus auch Verbreitungskarten, zahlreiche Fotos und Diagramme. Artübergreifende Aspekte werden in 15 Fokuskapiteln erläutert und umfassen Themen wie die Wiederansiedlung ausgestorbener Arten oder den Umgang mit Großraubtieren.Neben ausgewiesenen Sachverständigen haben im Rahmen von Citizen-Science-Projekten auch zahlreiche Laien am Atlas mitgewirkt.Das Werk ist auch in französischer (ISBN 978-3-258-08179-3) und italienischer (978-3-258-08180-9) Sprache erschienen.

graf-biblio

Freigegeben in G
Mittwoch, 14 April 2021 10:26

WÜSTER, W. et al. (2018)

Integration of nuclear and mitochondrial gene sequences and morphology reveals unexpected diversity in the forest cobra (Naja melanoleuca) species complex in Central and West Africa (Serpentes: Elapidae)

Zootaxa 4455 (1): 068–098.  http://www.mapress.com/j/zt/. ISSN1175-5334(online edition).

Abstract:

Cobras are among the most widely known venomous snakes, and yet their taxonomy remains incompletely understood, particularly in Africa. Here, we use a combination of mitochondrial and nuclear gene sequences and morphological data to diagnose species limits within the African forest cobra, Naja (Boulengerina) melanoleuca. Mitochondrial DNA sequences reveal deep divergences within this taxon. Congruent patterns of variation in mtDNA, nuclear genes and mor-phology support the recognition of five separate species, confirming the species status of N. subfulva and N. peroescobari, and revealing two previously unnamed West African species, which are described as new: Naja (Boulengerina) guineensis sp. nov. Broadley, Trape, Chirio, Ineich & Wüster, from the Upper Guinea forest of West Africa, and Naja (Boulengerina) savannula sp. nov. Broadley, Trape, Chirio & Wüster, a banded form from the savanna-forest mosaic of the Guinea and Sudanian savannas of West Africa. The discovery of cryptic diversity in this iconic group highlights our limited under-standing of tropical African biodiversity, hindering our ability to conserve it effectively.

wüster-biblio

Freigegeben in W

Larval morphology and development of the Malagasy frog Mantidactylus betsileanus.

SALAMANDRA 49(4): 186–200. ISSN 0036–3375.

Abstract.

The Mantellidae is a species-rich family of neobatrachian frogs endemic to Madagascar and Mayotte. Although tadpoles have been described from many mantellids, detailed studies of their early embryonic development are rare. We provide a documentation of the developmental stages of Mantidactylus betsileanus, a common mantellid frog of Madagascar’s eastern rainforests, based on clutches deposited and raised in captivity. Metamorphosis was completed after 89 days on average. External gills were not recognizable in the embryos, similar to three other, previously studied mantellids, which apparently constitutes a difference to the mantellid sister group, the Rhacophoridae. We also provide updated descriptions of the species’ larval morphology at stage 25 and stage 36, respectively, from captive bred and wild-caught individuals, and report variations in the keratodont row formula from 0/2, 1/1, 1/3 to 1:1+1/3.

scheld-biblio

Freigegeben in S

A Taxonomic Revision of Boas (Serpentes: Boidae).

Zootaxa 3846 (2): 249-260.

Abstract:

Large molecular datasets including many species and loci have greatly improved our knowledge of snake phylogeny, particularly within the group including boas (Table 1). Recent taxonomic revisions using molecular phylogenies have clarified some of the previously contentious nomenclature of the group (Wilcox et al. 2002; Lawson et al. 2004; Burbrink 2005; Noonan & Chippindale 2006), resulting in a robust taxonomy that is mostly concordant with the phylogeny as currently known, which includes ~85% of described, extant species (Pyron et al. 2013; Reynolds et al. 2014). However, a few unresolved issues remain, related primarily to the rules of the International Code of Zoological Nomenclature (the Code hereafter) and the application of Linnaean ranks (International Commission on Zoological Nomenclature et al. 1999).

pyron-biblio

Freigegeben in P

A review of  the systematics of the genus Bradypodion (Sauria: Chamaeleonidae), with the description of two new genera.

Zootaxa 1363: 23–38. ISSN1175-5334 (online edition) 

Abstract:

The taxonomic history and composition of the genus Bradypodion as construed by Klaver & Böhme (1986) and new morphological and molecular data relevant to the taxonomy of the group is reviewed. The combined evidence strongly supports a formal rearrangement of the group into three distinct genera. Bradypodion, type species Chamaeleo pumilus Daudin 1802, is retained for the southern African species. Two new genera are erected to accommodate additional well-diagnosed clades within central and east African species previously referred to Bradypodion. Species of the “fischeri complex” are assigned to Kinyongia gen. nova, whilst the endemic Mulanje chameleon is placed in the monotypic genus Nadzikambia gen. nova.

tilbury-biblio

Freigegeben in T
Seite 1 von 34
© Peter Dollinger, Zoo Office Bern hyperworx