scholarly journals Morphometric and genetic variations of species composers of nike fish assemblages in Gorontalo Bay Waters, Indonesia

2020 ◽  
Vol 21 (10) ◽  
Author(s):  
Femy M. Sahami ◽  
Rene Charles Kepel ◽  
Abdul Hafidz Olii ◽  
Silvester Benny Pratasik ◽  
Ridwan Lasabuda ◽  
...  
Keyword(s):  
Life Cycle ◽  
Molecular Analysis ◽  
Morphometric Analysis ◽  
Fish Assemblages ◽  
Genetic Variations ◽  
Morphometric Characters ◽  
Juvenile Stages ◽  
Coi Sequences ◽  
Amphidromous Species ◽  
Molecular Characters

Abstract. Sahami FM, Kepel RC, Olii AH, Pratasik SB, Lasabuda R, Wantasen A, Habibie SA. 2020. Morphometric and genetic variations of species composers of nike fish assemblages in Gorontalo Bay Waters, Indonesia. Biodiversitas 21: 4571-4581.  Nike is Gobioidei fish at the post-larval and juvenile stages whose habitat is still in seawater before they migrate to the freshwater, grow up, and spawn to fulfill their life cycle as an amphidromous species. This study aims to identify the species composers of Nike fish in Gorontalo Bay waters based on their morphometric and molecular characters. 2,523 samples were collected from the catches of fishermen during three periods of their appearance in Gorontalo Bay waters from January to March 2019. The samples were grouped based on their similarity of melanophore patterns, and morphometric characters of 10 units were then measured. This study found 20 different groups of melanophore patterns; 15 of them were new melanophore patterns. DNA samples from each group of new melanophore patterns were then isolated for molecular analysis. The morphometric analysis grouped the 20 melanophore patterns into three separate clusters that were confirmed through molecular analysis. The results of Gen Cytochrome Oxidase I (COI) sequences indicate that the new melanophore patterns of Nike fish assemblages consisting of six species; five species in the Gobiidae family (i.e. Sicyopterus parvei, S. cynocephalus, S. longifilis, S. lagocephalus, and Stiphodon semoni) and a species in the Eleotridae family (Belobranchus belobranchus).

scholarly journals PRIMATA BESAR DI JAWA: SPESIMEN BARU GIGANTOPITHECUS DARI SEMEDO

2016 ◽  
Vol 36 (2) ◽  
pp. 141-160 ◽  
Author(s):  
Sofwan Noerwidi
Keyword(s):  
Morphometric Analysis ◽  
Research Problem ◽  
Homo Erectus ◽  
Taxonomic Position ◽  
Tropical Environment ◽  
High Latitudes ◽  
Comparison Study ◽  
Species Identity ◽  
Morphometric Characters ◽  
Very High

In 2014 there was found two "enigmatic" specimens of mandible, which named as Semedo 3417 and 3418. Both mandibles are morphologically similar but twice bigger than common primate’s jaw. In this research, we use morphology and morphometric analysis to determine the species identity and taxonomic position of those specimens. For comparison study we use some samples from Homo erectus (Java and China), Gigantopithecus (blacki and bilaspurensis), Australopithecines (robust and gracile). Based on morphology and morphometric characters on the mandible and teeth, it is concluded that Semedo specimen tends to be close to Gigantopithecus blacki. The discoveries of Gigantopithecus fossil in Java has implication on some research problem, especially regarding the adaptation pattern of this species which known only found at high latitudes environment. Furthermore this discovery has reinforced the perspective that tropical environment has a very high biodiversity, particularly on primate fossils.

Problems of compensative fisheries: increasing the adaptive potential of broad whitefish Coregonus nasus (Pallas) in early ontogenesis by weak magnetic fields. 1. Morphometric analysis

2020 ◽  
pp. 32-46
Author(s):  
Alexander Germanovich Selyukov ◽  
Ekaterina Vladimirovna Efremova ◽  
Svetlana Aleksandrovna Selyukova ◽  
Leonid Alexandrovich Shuman
Keyword(s):  
Magnetic Fields ◽  
Morphometric Analysis ◽  
Juvenile Fish ◽  
Morphological Characters ◽  
Control Treatment ◽  
Physical Factors ◽  
Morphometric Characters ◽  
Ob River ◽  
Biological Potential ◽  
Organ Systems

The article presents the results of a production experiment with the embryos of Coregonus nasus, delivered at the Sobsk fish hatchery (settlement Kharp, YaNAO). The plant is taking compensatory measures to restore the number of valuable species of whitefishes in the Ob river basin. The purpose of our study was to increase the biological potential of juvenile broad whitefish for their subsequent release to the Ob river. At the last stage of the embryonic period, the embryos were treated with ultra-weak pulsed magnetic fields for several days. In the postembryonic period, the control and experimental juveniles of broad whitefish were fixed for subsequent morphometric and cytological-histological analysis. After conducting a morphometric analysis, we found that already at the early stages of the postembryonic period, the experimental larvae and fry exceeded the control ones in most parameters. Later, these differences persisted. At the same time, the juveniles of the experimental batch showed, as a rule, less variability of morphological characters. Also, the weight of the experimental fry before release to the Ob significantly exceeded the weight of the control fry. We calculated the degree of correlation of morphometric characters in juvenile broad whitefish of both parties in the process of rearing and found that during the first month the correlation of most parameters in the experimental juveniles was lower than in the control. However, with further development, the degree of relationship between the parameters in juveniles in the experiment increased and reached it in the control. Later, the allometric growth of the experimental juveniles began, which caused a decrease in the connection between some characters. We are discussing the features of the development of experimental juvenile fish; activation of its natural mechanisms of autorehabilitation by using weak physical factors. We explain the reasons for the stable, but insignificant differences between the experimental fish fry over the control treatment with an ultra-weak pulsed magnetic field at the last stages of embryogenesis, when the main organ systems are already formed. We conclude that this approach is advisable, starting with fertilization and early embryogenesis.

Morphological variation in Xenoxybelis boulengeri (Procter, 1923) (Serpentes, Xenodontinae, Philodryadini)

Zootaxa ◽  
2008 ◽  
Vol 1743 (1) ◽  
pp. 53 ◽  
Author(s):  
ANA LÚCIA DA COSTA PRUDENTE ◽  
MÁRCIO ANDRÉ AMORIM DA SILVA ◽  
WÁLDIMA ALVES DA ROCHA ◽  
FRANCISCO LUÍS FRANCO
Keyword(s):  
Morphological Variation ◽  
Rare Species ◽  
Original Description ◽  
External Morphology ◽  
Time Analysis ◽  
Morphometric Characters ◽  
Permit Allocation ◽  
Scientific Collections ◽  
First Time ◽  
Molecular Characters

The genus Xenoxybelis contains two species, X. argenteus and X. boulengeri, characterized by semi-arboreal habits and an extremely thin rostral area, classified in the subfamily Xenodontinae (Colubridae). Xenoxybelis boulengeri is considered a rare species and is poorly represented in scientific collections. Its external morphology is known only from the original description and seven other specimens. In this study, twenty additional specimens were examined from the Brazilian states of Acre, Amazonas and Rondônia. Variation in meristic and morphometric characters are described, and new characters are incorporated in a revised diagnosis of the species. Illustrations and a description of the hemipenes of X. boulengeri are presented for the first time. Analysis of morphological and molecular characters permit allocation of Xenoxybelis to the tribe Phylodryadini, together with Ditaxodon, Philodryas, Pseudablabes and Tropidodryas.

Multi-instar descriptions of cave dwelling Erythraeidae (Trombidiformes: Parasitengona) employing an integrative approach

Zootaxa ◽  
2019 ◽  
Vol 4717 (1) ◽  
pp. 137-184 ◽  
Author(s):  
SAMUEL GEREMIAS DOS SANTOS COSTA ◽  
HANS KLOMPEN ◽  
LEOPOLDO FERREIRA DE OLIVEIRA BERNARDI ◽  
LUCIANA CARDOSO GONÇALVES ◽  
DANTE BATISTA RIBEIRO ◽  
...  
Keyword(s):  
Life Cycle ◽  
Cytochrome Oxidase ◽  
Molecular Analysis ◽  
Species Delimitation ◽  
Morphological Changes ◽  
Molecular Data ◽  
Coi Gene ◽  
Integrative Approach ◽  
Larval Instars ◽  
Individual Host

The life cycle of Parasitengona includes major morphological changes precluding an instar association based only on the morphology. This makes rearing and/or molecular data necessary to associate the heteromorphic instars. Most of the described species are known from either post larval instars or larva. Following a previous study on Palearctic Erythraeidae, in the present study the instar association was made through an integrative approach including rearing trials and molecular analysis of the cytochrome oxidase I (COI) gene with the Bayesian Generalized Mixed Yule Coalescent (bGMYC) algorithm for species delimitation. Two new cave dwelling Erythraeidae (Trombidiformes: Parasitengona) species are described Lasioerythraeus jessicae sp. nov. and Leptus sidorchukae sp. nov. including all active instars. Additionally, a complete description of the previously unknown adults of Charletonia rocciai Treat & Flechtmann, 1979 is provided with notes on the larva and deutonymph. We also demonstrate experimentally that Ch. rocciai larvae are not attached to the same individual host during the entire feeding stage. We discuss the presence of troglomorphisms in Le. sidorchukae sp. nov.; and the distribution of the species. 

Morphological and molecular characters reveal the status of Pedesta rubella (Devyatkin, 1996) stat. n. and P. similissima (Devyatkin, 2002) syn. n. (Lepidoptera, Hesperiidae)

Zootaxa ◽  
2020 ◽  
Vol 4743 (2) ◽  
pp. 217-231
Author(s):  
MENG LI ◽  
ALEXANDER L. MONASTYRKII ◽  
KIRILL A. KOLESNICHENKO ◽  
ZIHAO LIU ◽  
GUOXI XUE ◽  
...  
Keyword(s):  
Neighbor Joining ◽  
Distribution Map ◽  
Separate Species ◽  
Outgroup Species ◽  
Wing Patterns ◽  
The Status ◽  
Nj Tree ◽  
The Mean ◽  
Coi Sequences ◽  
Molecular Characters

To clarify the relationships of Pedesta submacula (Leech, 1890), P. submacula rubella (Devyatkin, 1996) and P. similissima (Devyatkin, 2002), specimens from various localities in China and Vietnam, including the type materials of P. submacula rubella and P. similissima were examined. A neighbor-joining (NJ) tree was also reconstructed based upon partial COI sequences of 24 ingroup specimens and 4 outgroup species. The result shows that P. similissima is a synonym of P. submacula, and P. submacula rubella belongs to a separate species. The mean Kimura-2-Parameter genetic distance between P. submacula and P. rubella stat. n. is 4.4%. Wing patterns and genitalic structures of these taxa are illustrated and compared. A distribution map of both species is provided. 

Fish assemblages associated with coastal defence structures in south-western Italy (Mediterranean Sea)

2004 ◽  
Vol 84 (3) ◽  
pp. 669-670 ◽  
Author(s):  
P. Guidetti
Keyword(s):  
Mediterranean Sea ◽  
Fish Assemblages ◽  
Assemblage Structure ◽  
Coastal Defence ◽  
Juvenile Stages

Fish assemblages associated with wave exposed and sheltered sides of breakwaters, and with adjacent sandy habitats were studied in western Calabria (Mediterranean Sea, south-western Italy). Overall, 26 fish taxa were recorded (21 associated with exposed breakwater sides, 21 with sheltered sides, and four with sand). Fish assemblages significantly differed between breakwaters (both sides) and sand, and, to a lesser extent, between exposed and sheltered sides of breakwaters in terms of whole assemblage structure, densities of species, and juvenile stages.

A morphometric analysis of hybrid salamanders (genus Ambystoma) and their progenitors on Kelleys Island in Lake Erie

1989 ◽  
Vol 67 (10) ◽  
pp. 2376-2383 ◽  
Author(s):  
Clifford W. Zeyl ◽  
Leslie A. Lowcock
Keyword(s):  
Morphometric Analysis ◽  
Principal Components ◽  
Lake Erie ◽  
Meristic Character ◽  
Discriminant Functions ◽  
Morphometric Characters ◽  
Size And Shape ◽  
Canonical Variates

Six morphometric characters and one meristic character were measured on 96 adult and 88 juvenile Ambystoma from Kelleys Island, where extensive hybridization involves three species. Canonical variates, discriminant functions, and size-constrained principal components analyses showed that A. laterale (represented only in hybrids on Kelleys Island), A. texanum, A. tigrinum, and A. laterale–texanum–tigrinum are distinguishable from each other and from a complex of hybrids involving A. texanum and A. laterale. Within the latter complex, different ploidies are not distinct morphologically. Introgression may explain isolated atypical individuals. Adults differ from juveniles in both size and shape, demonstrating allometry.

Life cycle and mating behavior of Helicotylenchus multicinctus (Nematoda: Hoplolaimidae) on excised Musa cavendishii roots

Biologia ◽  
2007 ◽  
Vol 62 (3) ◽  
Author(s):  
Mehmet Karakaş
Keyword(s):  
Life Cycle ◽  
Mating Behavior ◽  
Juvenile Stage ◽  
Adult Males ◽  
Second Stage ◽  
Stage Juvenile ◽  
Juvenile Stages ◽  
Males And Females ◽  
Final Molt

AbstractThe life cycle and mating behavior of Helicotylenchus multicinctus (Nematoda: Hoplolaimidae) were observed in vitro on excised roots of Musa cavendishii in gnotobiotic culture. Eggs hatched into juveniles whose appearance and structure were similar to those of the adults. Juveniles grew in size and each juvenile stage was terminated by a molt. H. multicinctus had four juvenile stages. The first molt occurred outside the egg shortly after hatching. After the final molt the juveniles differentiated into adult males and females. Mating was required for reproduction. After mating, fertilized females began to lay eggs. The life cycle from second stage juvenile to second stage juvenile was completed in 39 days.

TAXONOMIC STATUS OF THE ROCKY MOUNTAIN LOCUST: MORPHOMETRIC COMPARISONS OF MELANOPLUS SPRETUS (WALSH) WITH SOLITARY AND MIGRATORY MELANOPLUS SANGUINIPES (F.)

1989 ◽  
Vol 121 (12) ◽  
pp. 1103-1109 ◽  
Author(s):  
Jeffrey A. Lockwood
Keyword(s):  
Morphometric Analysis ◽  
Rocky Mountain ◽  
Taxonomic Status ◽  
Environmental Variation ◽  
Body Measurements ◽  
Melanoplus Sanguinipes ◽  
Morphometric Characters ◽  
The Status ◽  
Solitary Phase

AbstractMorphometric analysis of 16 body measurements of migratory and solitary Melanoplus sanguinipes (F.) and M. spretus (Walsh) was used to determine if M. spretus was, in fact, the migratory phase of M. sanguinipes. Migratory M. sanguinipes was found to be more similar to its own solitary phase than to M. spretus. Melanoplus spretus resembled migratory M. sanguinipes, but in 14 comparisons M. spretus differed significantly from both solitary and migratory M. sanguinipes. Despite the potential for environmental variation obscuring differences in morphology, the divergent morphometric characters of M. spretus and the phases of M. sanguinipes appear to justify the status of M. spretus as a true species.

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