Filling missing links in albuneid crab distributions (superfamily Hippoidea) in the Bay of Bengal, eastern Indian Ocean

Crustaceana ◽  
2018 ◽  
Vol 91 (12) ◽  
pp. 1495-1504 ◽  
Author(s):  
Rajan Kumar ◽  
Shikha Rahangdale ◽  
Subal Kumar Roul
Keyword(s):  
Indian Ocean ◽  
Bay Of Bengal ◽  
Morphological Characters ◽  
Eastern Indian Ocean ◽  
Species Discrimination ◽  
Gulf Of Mannar ◽  
Fishing Gear ◽  
Morphometric Characters ◽  
First Time

Abstract Albuneid crabs are specialized and active sand-burrowing organisms. Despite their substantial diversity, their ability to avoid fishing gear leads to “under collection” and a discontinuous record of distribution. The present study documents the first distributional record of Albunea occulta Boyko, 2002 from the Bay of Bengal, eastern Indian Ocean. Albunea thurstoni Henderson, 1893 is also recorded for the first time from the area, i.e., from the Gulf of Mannar, southwestern Bay of Bengal. This study further reports variation in morphological characters, especially in the carapace grooves (CG) from previous records and across specimens from different regions. Morphometric characters were found useful in species discrimination, which is explained as well.

Length‐weight relationship of six demersal fish species from Gulf of Mannar, Bay of Bengal, Eastern Indian Ocean

2021 ◽  
Author(s):  
Kannan Karuppiah ◽  
Sivaranjani Sekar ◽  
Kumar Rajendran ◽  
Karuppasamy Karuthapandian ◽  
Prabhu N. Marimuthu ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Fish Species ◽  
Bay Of Bengal ◽  
Demersal Fish ◽  
Eastern Indian Ocean ◽  
Gulf Of Mannar ◽  
Weight Relationship ◽  
Relationship Of

Length‐weight relationship of seven bycatch fish species caught along the Chennai coast, Bay of Bengal, Eastern Indian Ocean

2020 ◽  
Vol 36 (2) ◽  
pp. 246-248 ◽  
Author(s):  
Paramasivam Kodeeswaran ◽  
Natarajan Jayakumar ◽  
Murugesan SriHari ◽  
Ramulu Durairaja ◽  
Jayasimhan Praveenraj ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Fish Species ◽  
Bay Of Bengal ◽  
Eastern Indian Ocean ◽  
Weight Relationship ◽  
Relationship Of

scholarly journals The Horizontal Distribution of Siliceous Planktonic Radiolarian Community in the Eastern Indian Ocean

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3502
Author(s):  
Sonia Munir ◽  
John Rogers ◽  
Xiaodong Zhang ◽  
Changling Ding ◽  
Jun Sun
Keyword(s):  
Indian Ocean ◽  
Chlorophyll A ◽  
Mixed Layer ◽  
Diversity Index ◽  
Horizontal Distribution ◽  
Eastern Indian Ocean ◽  
Entire Area ◽  
Factors Affecting ◽  
Major Factors ◽  
First Time

The plankton radiolarian community was investigated in the spring season during the two-month cruise ‘Shiyan1’ (10 April–13 May 2014) in the Eastern Indian Ocean. This is the first comprehensive plankton tow study to be carried out from 44 sampling stations across the entire area (80.00°–96.10° E, 10.08° N–6.00° S) of the Eastern Indian Ocean. The plankton tow samples were collected from a vertical haul from a depth 200 m to the surface. During the cruise, conductivity–temperature–depth (CTD) measurements were taken of temperature, salinity and chlorophyll a from the surface to 200 m depth. Shannon–Wiener’s diversity index (H’) and the dominance index (Y) were used to analyze community structure. There was a total of 168 plankton species, composed of Acantharia, Phaeodaria, Polycystina, Collodaria and Taxopodida (monospecific—Sticholonche zanclea, Hertwig is the only recognized species). Hence, it included both celestine-based and siliceous organisms, which are also described here for the first time from this region. Total radiolarians ranged from 5 to 5500 ind/m−3, dominated by co-occurrences of Sphaerozoum punctatum and Stichonche zanclea species at the south-equator zone (SEQ)-transect 80° E and equator zone (EQ)-transect Lati-0. The possible environmental variables were tested through RDA analysis; although no result was obtained for the full species dataset, the samples from the equatorial transect related strongly to mixed-layer chlorophyll a concentration and those of a north–south transect to surface silicate concentrations or mixed-layer nitrate were significantly correlated (p < 0.01) to the radiolarian community. Our results indicate that the silicate and chlorophyll-a concentrations are the two major factors affecting the radiolarian distribution along two of the investigated transects (southern equator and equator) in the study area.

Redescriptions of two poorly known deep-sea shrimps (Crustacea: Decapoda: Caridea: Pasiphaeidae and Glyphocrangonidae) from the Andaman Sea, eastern Indian Ocean

Zootaxa ◽  
2017 ◽  
Vol 4303 (1) ◽  
pp. 73
Author(s):  
TOMOYUKI KOMAI ◽  
TIN-YAM CHAN
Keyword(s):  
Indian Ocean ◽  
Deep Sea ◽  
Western Indian Ocean ◽  
Morphological Characters ◽  
Andaman Sea ◽  
Eastern Indian Ocean ◽  
Single Specimen ◽  
Present Material ◽  
Diagnostic Features ◽  
Western Atlantic

Two deep-sea caridean shrimps are reported on the basis of topotypic materials recently collected from the Andaman Sea off Myanmar, eastern Indian Ocean: Pasiphaea unispinosa Wood-Mason, 1892 (Pasiphaeidae) and Glyphocrangon smithii Wood-Mason & Alcock, 1891b (Glyphocrangonidae). These two taxa are poorly known in literature, and thus their diagnostic features remain to be reassessed. The present material enabled us to describe morphological characters of the two species in detail, even though only a single specimen is available for each species. Pasiphaea unispinosa closely resembles P. merriami Schmitt, 1931 from the western Atlantic, but the distinctly carinate middorsal carapace, the deep branchiostegal sinus and the different structure of the pleonal tergites distinguish P. unispinosa from P. merriami. Glyphocrangon smithii is most similar to G. amblytes Komai, 2004 from the western Indian Ocean and G. wagini from Sala y Gomez Ridge in the eastern Pacific, but it is distinctive in having an unusually deep longitudinal groove on the extensor surface of each pereopod 4 and 5 dactylus. 

scholarly journals First distributional record of sixteen Coral associated fish species from Saint Martin’s island, Bangladesh

2021 ◽  
Vol 48 (2) ◽  
pp. 263-288
Author(s):  
Shilpi Saha ◽  
Shamsunnahar ◽  
Subrina Sehrin ◽  
Anirban Sarker ◽  
Kazi Ahsan Habib ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Fish Species ◽  
Bay Of Bengal ◽  
Western Indian Ocean ◽  
Landing Zone ◽  
Morphological Studies ◽  
The Family ◽  
First Occurrence ◽  
Reef Fish Species ◽  
First Time

The Bangladeshi reef fish species have not been studied thoroughly. An attempt has been made for taxonomic identification of coral-associated fish through morphological studies. Mostly dead and few live fishes were collected from local fishermen, fish landing zone, and fish markets in St. Martin’s Island, Bay of Bengal, Bangladesh, from October 2015 to July 2016, visiting seven times. Samples were also obtained from local boys who collected fishes by using hook and line. The study recorded the first occurrence of 16 coral-associated fish species such as Caesio cuning, Lethrinus ornatus, Upeneus suahelicus, Upeneus asymmetricus, Scarus taeniopterus, Scarus zufar, Bodianus neilli, Parapercis clathrata, Parapercis diplospilus, Pomadasys furcatus, Siganus fuscescens, Acanthopagrus berda, Gerres erythrourus, Lagocephalus spadiceus, Psettodes bennettii, and Heteroconger perissodon. Among them, Parapercis clathrata, Parapercis diplospilus belongs to the family Pinguipedidae before, no species was recorded under this family from Bangladesh and a rare and endemic species, Scarus zufar, of the Arabian Sea off Dhofar (Zufar), Oman in the Western Indian Ocean, was recorded for the first time in the Northern Indian Ocean in the northeastern part of Bay of Bengal. This study increased the number of coral-associated fish from 240 to 256 species and the number of families from 54 to 55 in the coral reef ecosystem of the Bay of Bengal, Bangladesh. Bangladesh J. Zool. 48(2): 263-288, 2020

scholarly journals Diversity of fishing gears and crafts used for harvesting the Asian seabass, Lates calcarifer along the Bay of Bengal, Bangladesh coast

2021 ◽  
Vol 33 (1) ◽  
pp. 147-155
Author(s):  
MOHAMMED ASHRAFUL HAQUE ◽  
MD. ISTIAQUE HOSSAIN ◽  
SHANUR JAHEDUL HASAN ◽  
PROBIN KUMAR DEY
Keyword(s):  
Bay Of Bengal ◽  
Secondary Data ◽  
Fishing Gear ◽  
Nursery Ground ◽  
Life Stages ◽  
Lates Calcarifer ◽  
Asian Seabass ◽  
Fishing Gears ◽  
Bay Of Bengal Coast ◽  
First Time

Though Asian Seabass, which is locally known as "Koral"/"Vetki," is a vital species in terms of its popularity and price, little is known about the location of breeding and nursery ground, peak breeding season, peak harvesting season, population dynamics, harvesting operation (gears and crafts used for harvesting) of this species in Bangladesh. An investigation was carried out to enlist the group of crafts and gears that are being operated on the Bay of Bengal coast by the fishermen for Asian seabass harvesting. The survey was based on interviews with the local fishermen and secondary data collected from the regional fisheries offices. The study revealed a total of 10 distinguishing fishing gears, including seven nets and two types of hook and lines were used for harvesting this fish. Some are selective for harvesting Seabass, but most of them are involved in multi-species exploitation. Four types of motorized and two types of non-motorized traditional boats are being used for harvesting the seabass in Bangladesh. The seabass fishery extends almost throughout the year at different life stages. The Koral net, Mela Barshi (Single Hook and line), and Push net were found to be effective for catching adult, pre-adult, and juvenile Asian seabasses, respectively. The Sampan boat and Mela barshi were reported for the first time as fishing boats and fishing gear in Bangladesh.

Systematic review and phylogeny of the firefly genus Dilychnia (Lampyridae: Lampyrinae), with notes on geographical range

2020 ◽  
Vol 190 (3) ◽  
pp. 844-888
Author(s):  
Stephanie Vaz ◽  
José Ricardo M Mermudes ◽  
Paulo C Paiva ◽  
Luiz Felipe L Da Silveira
Keyword(s):  
Phenotypic Diversity ◽  
Morphological Characters ◽  
Colour Pattern ◽  
Species Discrimination ◽  
Key To Species ◽  
Diagnostic Features ◽  
Orange Yellow ◽  
Light Organs ◽  
First Time ◽  
High Support

Abstract Dilychnia (Lampyridae: Lampyrinae) is a poorly known Neotropical genus of lampyrid firefly. Descriptions of Dilychnia species were traditionally based on differences in colour pattern, which are usually not reliable for species discrimination. Here, we review and redescribe the genus Dilychnia and its species, after examining the type material of all species, and we present the first phylogenetic analysis for the group, including 70 morphological characters and 15 species. After the proposal of new taxonomic combinations, Dilychnia was recovered as monophyletic with high support. We provide a key to species identification, updated geographical ranges and illustrations of diagnostic features for all species. We transfer Lucidota propinqua and Photinus succensus to Dilychnia and describe the new species Dilychnia dumasi sp. nov. We report, for the first time, that these three taxa are nocturnal and flash with an orange-yellow light. Phenotypic diversity within the genus is most pronounced in characters involved in mate tracking (i.e. antennae, eyes and light organs).

scholarly journals Molecular phylogenetic analysis and comparative morphology reveals the diversity and distribution of needle nematodes of the genus Longidorus (Dorylaimida: Longidoridae) from Spain

2019 ◽  
Vol 88 (1) ◽  
pp. 1-41 ◽  
Author(s):  
Antonio Archidona-Yuste ◽  
Carolina Cantalapiedra-Navarrete ◽  
Pablo Castillo ◽  
Juan E. Palomares-Rius
Keyword(s):  
Comparative Morphology ◽  
Molecular Data ◽  
Integrative Taxonomy ◽  
Plant Viruses ◽  
Wild Plants ◽  
Species Discrimination ◽  
Morphometric Characters ◽  
Molecular Phylogenetic ◽  
First Time ◽  
Ectoparasitic Nematodes

The genus Longidorus constitutes a large group of approximately 170 species of plant-ectoparasitic nematodes that are polyphagous and distributed almost worldwide. Some of the species of this genus are vectors of plant viruses. Species discrimination in Longidorus is difficult because the morphology is very conservative, and morphometric characters often overlap, leading to potential misidentification. Integrative taxonomy, based on the combination of molecular analyses with morphology, is a useful and necessary approach in Longidorus species identification. In Spain from 2014 to 2017, we conducted nematode surveys among cultivated and wild plants, from which we identified 13 populations of Longidorus, two of which appeared to represent new species and are described herein as L. iliturgiensis sp. nov. and L. pacensis sp. nov., and 11 populations belonging to eight known species: L. africanus, L. baeticus, L. carpetanensis, L. fasciatus, L. nevesi, L. cf. olegi, L. pini, and L. vallensis. Three species are new geographical records for Spain (L. nevesi, L. cf. olegi, and L. africanus). We report molecular data for L. nevesi, L. cf. olegi, L. carpetanensis and L. pini for the first time. Additionally, we describe the males of L. pini and the juveniles of L. cf. olegi.

First record of the genus Discotylenchus Siddiqi, 1980 (Nematoda: Tylenchidae) from Iran, with description of one new and data on two known species

Zootaxa ◽  
2012 ◽  
Vol 3493 (1) ◽  
pp. 72
Author(s):  
RAZIEH GHAEMI ◽  
EBRAHIM POURJAM ◽  
MOHAMMAD REZA ATIGHI ◽  
MAJID PEDRAM ◽  
GERRIT KARSSEN
Keyword(s):  
Tail Length ◽  
Original Description ◽  
First Record ◽  
Morphological Characters ◽  
Morphometric Characters ◽  
Lateral Field ◽  
Original Population ◽  
Stylet Length ◽  
First Time ◽  
Labial Disc

The genus Discotylenchus is reported for the first time from Iran. Discotylenchus iranicus n. sp. is described and illustratedbased on morphological and morphometric characters. The new species is characterized by a combination of the followingmorphological features: lip region continuous and smooth, tapering to an offset prominent labial disc, lateral field withfour incisures, stylet length of 14–15μm, vulva position at 70.8–76.5 %, tail length of 81–100μm, conoid with a roundedtip and presence of males. The Iranian population of D. brevicaudatus shows a wider morphometric range compared tothe original description and the male of this species is described for the first time. The morphological characters and range of morphometric data of D. discretus are in full agreement with the original population.

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