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Fig. 6. Agarna malayi Tiwari 1952 in Agarna malayi Tiwari 1952 (Crustacea: Isopoda: Cymothoidae) Parasitising the Marine Fish, Tenualosa toli (Clupeidae) from India: Re-description/description of Parasite Life Cycle and Patterns of Occurrence

Fig. 6. Agarna malayi Tiwari 1952 ex Tenualosa toil (Valenciennes) male (A) dorsal view; (B) ventral view; (C) antennule; (D) antenna; (E) mandible; (F) maxillule; (G) maxilla; (H) maxilliped. © 2018 Academia Sinica, Taiwan

Fig. 5. Agarna malayi Tiwari 1952 in Agarna malayi Tiwari 1952 (Crustacea: Isopoda: Cymothoidae) Parasitising the Marine Fish, Tenualosa toli (Clupeidae) from India: Re-description/description of Parasite Life Cycle and Patterns of Occurrence

Fig. 5. Agarna malayi Tiwari 1952 ex Tenualosa toli (Valenciennes) transitional stage, (A) dorsal view; (B) mandible; (C) maxillule; (D) maxilla; (E) maxilliped; (F) pleopod 2.

Fig. 3. Agarna malayi Tiwari 1952 in Agarna malayi Tiwari 1952 (Crustacea: Isopoda: Cymothoidae) Parasitising the Marine Fish, Tenualosa toli (Clupeidae) from India: Re-description/description of Parasite Life Cycle and Patterns of Occurrence

Fig. 3. Agarna malayi Tiwari 1952 ex Tenualosa toli (Valenciennes) ovigerous female, (A-B) dorsal view; (C) ventral view; (D) antennule; (E) antenna; (F) mandible; (G) maxillule; (H) maxilla; (I) maxilliped. © 2018 Academia Sinica, Taiwan

Fig. 1 in Agarna malayi Tiwari 1952 (Crustacea: Isopoda: Cymothoidae) Parasitising the Marine Fish, Tenualosa toli (Clupeidae) from India: Re-description/description of Parasite Life Cycle and Patterns of Occurrence

Fig. 1. Photographs of the holotype and paratype of Agarna malayi Tiwari 1952 specimens studied: (A) holotype (C3121/2) dorsal view; (B) holotype (C3121/2) ventral view; (C) paratype (C3122/2) dorsal view; (D) paratype (C3122/2) ventral view; (E) branchial cavity of Nematalosa nasus, showing the holotype (C3122/2) in situ; (F) branchial cavity of Nematalosa nasus, showing the paratype (C3122/2) in situ.

Fig. 2. Agarna malayi Tiwari 1952 in Agarna malayi Tiwari 1952 (Crustacea: Isopoda: Cymothoidae) Parasitising the Marine Fish, Tenualosa toli (Clupeidae) from India: Re-description/description of Parasite Life Cycle and Patterns of Occurrence

Fig. 2. Agarna malayi Tiwari 1952 ex Tenualosa toli (Valenciennes). (A-B) male dorsal and ventral view; (C-D) transitional stage dorsal and ventral view; (E-F) ovigerous female dorsal view; (G) manca II larva; (H) juvenile; (I) ovigerous female on T. toli; (J) manca II on T. toli.

Fig. 4. Agarna malayi Tiwari 1952 in Agarna malayi Tiwari 1952 (Crustacea: Isopoda: Cymothoidae) Parasitising the Marine Fish, Tenualosa toli (Clupeidae) from India: Re-description/description of Parasite Life Cycle and Patterns of Occurrence

Fig. 4. Agarna malayi Tiwari 1952 ex Tenualosa toli (Valenciennes) ovigerous female, (A-G) pereopods 1-7; (H) brood; (I) pleopod 2; (J) pleopod 5; (K) uropod; (L) pleotelson and uropods.

opennotspecifiedAug 2024View details →

Arctic Biodiversity: Arctic Marine Fishes

Biogeography and other attributes for Arctic organisms, various sources.

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Data from: Habitat discontinuities separate genetically divergent populations of a rocky shore marine fish

Habitat fragmentation has been suggested to be responsible for major genetic differentiations in a range of marine organisms. In this study, we combined genetic data and environmental information to unravel the relative role of geography and habitat heterogeneity on patterns of genetic population structure of corkwing wrasse (Symphodus melops), a rocky shore species at the northern limit of its distribution range in Scandinavia. Our results revealed a major genetic break separating populations inhabiting the western and southern coasts of Norway. This genetic break coincides with the longest stretch of sand in the whole study area, suggesting habitat fragmentation as a major driver of genetic differentiation of this obligate rocky shore benthic fish in Scandinavia. The complex fjords systems extending along the western coast of Norway appeared responsible for further regional genetic structuring. Our findings indicate that habitat discontinuities may lead to significant genetic fragmentation over short geographical distances, even for marine species with a pelagic larval phase, as for this rocky shore fish.

opencc-zeroDec 2015View details →

Figure 3 in Redescription of Pseudacanthocanthopsis secunda (Yamaguti and Yamasu, 1960) (Copepoda: Chondracanthidae) parasitic on marine fishes from the Seto Inland Sea, Japan and the East China Sea off Japan and Korea

Figure 3. Pseudacanthocanthopsis secunda (Yamaguti and Yamasu, 1960), adult male. (A) Habitus, dorsal; (B) same, lateral; (C) genito-abdomen, ventral; (D) left antennule (arrowhead indicates aesthetasc), dorsal; (E) left antenna, posterior; (F) right mandible, ventral; (G) right maxillule, posterior; (H) right maxilla, posterior; (I) right maxilliped, lateral. Scale bars: A, B = 100 µm; C = 50 µm; D, I = 20 µm; E, H = 10 µm; F, G = 5 µm.

Figure 1 in Redescription of Pseudacanthocanthopsis secunda (Yamaguti and Yamasu, 1960) (Copepoda: Chondracanthidae) parasitic on marine fishes from the Seto Inland Sea, Japan and the East China Sea off Japan and Korea

Figure 1. Pseudacanthocanthopsis secunda (Yamaguti and Yamasu, 1960), adult female. (A) Habitus, dorsal; (B) same, ventral; (C) genito-abdomen, ventral; (D) left antennule, including enlarged view of distal end, ventral. Scale bars: A, B = 300 µm; C = 50 µm; D = 100 µm.

Figure 2 in Redescription of Pseudacanthocanthopsis secunda (Yamaguti and Yamasu, 1960) (Copepoda: Chondracanthidae) parasitic on marine fishes from the Seto Inland Sea, Japan and the East China Sea off Japan and Korea

Figure 2. Pseudacanthocanthopsis secunda (Yamaguti and Yamasu, 1960), adult female. (A) Left antenna, with enlarged view of distal end of atrophied tip and surface ornamentation on coxobasis and endopod, anterior; (B) labrum, ventral; (C) left mandible, dorsal; (D) right maxillule, dorsal; (E) right maxilla, posterior; (F) left maxilliped, posterior; (G) right leg 1, ventral; (H) left leg 2, ventral. Scale bars: A, B, E, F = 20 µm; C, D, H = 10 µm; G = 50 µm.

Figure 4 in Redescription of Pseudacanthocanthopsis secunda (Yamaguti and Yamasu, 1960) (Copepoda: Chondracanthidae) parasitic on marine fishes from the Seto Inland Sea, Japan and the East China Sea off Japan and Korea

Figure 4. Pseudacanthocanthopsis secunda (Yamaguti and Yamasu, 1960), adult male. (A) Right leg 1, anterior; (B) left leg 2, anterior. Scale bars: A, B = 20 µm.

opencc-zeroAug 2021View details →

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Climate differently influences genomic patterns of two sympatric marine fish species

1- Climate influences population genetic variation of marine species. Capturing those impacts remains challenging for marine fishes dispersing over a large geographic scale spanning steep environmental gradients. This requires an extensive spatial sampling of individuals or populations, representative of seascape heterogeneity, combined with a set of highly informative molecular markers able to reveal climatic-associated genomic variations. 2- We explored how space, dispersal and environment shape the genomic patterns of two marine fish species. We hypothesized that population structure and climate-associated genomic signatures of selection will be stronger in the less mobile species, as restricted gene flow tends to facilitate the fixation of locally adapted alleles. 3- To investigate our hypothesis, we genotyped two species that share a common environment but have contrasting dispersal abilities, the white seabream (Diplodus sargus) and striped red mullet (Mullus surmuletus). We collected 823 samples across the Mediterranean Sea, which ranks among the oceanic basins the most affected by climate change and human pressures. We used genotyping by sequencing (GBS) to detect 8 206 Single Nucleotides Polymorphisms (SNPs) for seabream and 2 794 for mullet. For each species, we identified highly differentiated genomic regions and disentangled the relative contribution of space, dispersal and environmental (climate, productivity) variables on genetic structure to test the prevalence of gene flow and local adaptation. 4- We observed contrasted patterns of gene flow and adaptive genetic variation between the two species. The seabream showed a separate Alboran sea population but further panmictia across the Mediterranean Sea, while the mullet revealed additional differentiation. The within-Mediterranean differentiation of mullet was significantly correlated to summer – and winter temperatures as well as productivity. Functional annotation of climate-associated outlier SNPs then identified candidate genes involved in heat tolerance that could be examined to further predict species' responses to climate change. 5- Our results illustrate the key steps of a comparative seascape genomics study that aims to unravel the evolutionary processes at play in marine species, in order to better anticipate their response to climate change. Defining population adaptation capacities and climatic niches can then serve to include complementary evolutionary processes in species conservation planning.

opennotspecifiedSep 2003View details →

F in A revision of F. R. Irvine's Ghanaian marine fishes in the collections of The Natural History Museum, London

F. 1. Map of Ghana to show location of sites along coast where Irvine's fish specimens were collected. Based on Irvine (1947: figure 1).

opennotspecifiedApr 2010View details →

FIGURE 1 in New records of marine fishes illustrate the biogeographic importance of Christmas Island, Indian Ocean

FIGURE 1. The location of Christmas Island and the Cocos (Keeling) Islands in the Indian Ocean. Inset: Christmas Island with the position of Flying Fish Cove indicated on the north coast.

FIGURE 4 in A new marine clupeoid fish from the Lower Cretaceous of the Sergipe-Alagoas Basin, northeastern Brazil

FIGURE 4. Pectoral girdle and fin and anteriormost pre-pelvic scutes of †Nolfia riachuelensis sp. nov. as preserved in Pz. UERJ 110. Scale bar = 0.5 cm.

FIGURE 5 in A new marine clupeoid fish from the Lower Cretaceous of the Sergipe-Alagoas Basin, northeastern Brazil

FIGURE 5. Restoration of the caudal endoskeleton of †Nolfia riachuelensis sp. nov. based on Pz. UERJ 110. Scale bar = 0.2 cm.

FIGURE 2 in A new marine clupeoid fish from the Lower Cretaceous of the Sergipe-Alagoas Basin, northeastern Brazil

FIGURE 2. †Nolfia riachuelensis sp. nov. Drawing of suspensorium, opercular bones, and other associated bones as preserved in Pz. UERJ 110. Scale bar = 0. 5 cm.

FIGURE 3 in A new marine clupeoid fish from the Lower Cretaceous of the Sergipe-Alagoas Basin, northeastern Brazil

FIGURE 3. Drawing of anteriormost abdominal vertebrae and associated structures of †Nolfia riachuelensis sp. nov. as preserved in Pz. UERJ 110. Scale bar = 0. 2cm.