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opencc-by-4.0Apr 2022View details →

Meristic and morphometric data of Albula species from Japan and adjacent waters

Meristic counts and morphometric measurements of Albula argentea (Forster, 1801); Albula glossodonta (Forsskål, 1775); Albula koreana Kwun and Kim, 2011; and Albula oligolepis Hidaka, Iwatsuki and Randall, 2008 from Japan and adjacent waters in the northwestern Pacific Ocean, based on Matsunuma et al. (2022) for examined specimens.

Fig. 10 in Taxonomic Reassessment of Albula (Albuliformes: Albulidae) from Japan and Adjacent Waters with Reliable Records of Albula argentea, A. koreana and A. oligolepis from Japan

Fig. 10. Relationships among numbers of scale rows (SR) between lateral line (LL) and mid-dorsal-fin base (DB), vertebrae and pored lateral-line scales in Albula argentea (red circles), A. koreana (green downward-triangles) and A. oligolepis (yellow upward-triangles).

Fig. 11 in Taxonomic Reassessment of Albula (Albuliformes: Albulidae) from Japan and Adjacent Waters with Reliable Records of Albula argentea, A. koreana and A. oligolepis from Japan

Fig. 11. Neighbor-joining (NJ) dendrogram showing derived p- distance matrix from parietal mitochondrial Cytochrome b gene sequence. Numbers at branches indicate>50% bootstrap probabilities in 1000 bootstrap replications. Colored (italicized) sample names indicate determined in present study; other sample names indicate accession numbers (see Table 1). At, EP and IP indicate Atlantic Ocean, Eastern Pacific Ocean and Indo-Pacific Oceans, respectively (showing distributional ranges).

Fig. 8 in Taxonomic Reassessment of Albula (Albuliformes: Albulidae) from Japan and Adjacent Waters with Reliable Records of Albula argentea, A. koreana and A. oligolepis from Japan

Fig. 8. Heads of Albula koreana (A) and A. argentea (B), showing comparison of color markings. (A) KAUM–I. 125129, 246.9 mm SL, Taiwan; (B) KAUM–I. 50220, 347.0 mm SL, Japan. Photos by KAUM.

Fig. 7 in Taxonomic Reassessment of Albula (Albuliformes: Albulidae) from Japan and Adjacent Waters with Reliable Records of Albula argentea, A. koreana and A. oligolepis from Japan

Fig. 7. Distributional map of Albula argentea (red circles), A. glossodonta (blue diamond), A. koreana (green downward-triangles) and A. oligolepis (yellow upward-triangles) in Indo-Pacific region (A) and Japan and adjacent waters (B). Albula glossodonta omitted in A. Closed and open symbols indicate records based on examined specimens and literature.

Fig. 6 in Taxonomic Reassessment of Albula (Albuliformes: Albulidae) from Japan and Adjacent Waters with Reliable Records of Albula argentea, A. koreana and A. oligolepis from Japan

Fig. 6. Frontal (top) and dorsal (bottom) views of snouts of (A) Albula argentea, (B) A. oligolepis and (C) A. koreana. (A) KAUM–I. 80897, 293.5 mm SL, Kagoshima, Japan; (B) NSMT-P 129038, 289.0 mm SL, Kagoshima, Japan; (C) KAUM–I. 1246, 250.1 mm SL, Kagoshima, Japan. Arrow in C indicates blotch on snout tip.

Fig. 5 in Taxonomic Reassessment of Albula (Albuliformes: Albulidae) from Japan and Adjacent Waters with Reliable Records of Albula argentea, A. koreana and A. oligolepis from Japan

Fig. 5. Dorsum of (A–C) Albula argentea and (D–F) A. koreana in preserved specimens (A, D), and schematic drawings (B, C, E, F). Scales with number indicate scale rows between lateral line and mid-dorsal-fin base; red, blue and yellow scales indicate 10th, 9th and 8th scale rows (SR) from lateral line; scales with small circle indicate pored lateral-line scales (PLS). (A, B) KAUM–I. 9013, 265.4 mm SL, Kagoshima, Japan; (C) KAUM–I. 80897, 293.5 mm SL, Kagoshima, Japan; (D, E) KAUM–I. 125129, 246.9 mm SL, Kaohsiung, Taiwan; (F) KAUM–I. 1246, 250.1 mm SL, Kagoshima, Japan.

Fig. 4 in Taxonomic Reassessment of Albula (Albuliformes: Albulidae) from Japan and Adjacent Waters with Reliable Records of Albula argentea, A. koreana and A. oligolepis from Japan

Fig. 4. Ventral views of lower jaw of preserved specimens of (A) Albula argentea, (B) A. koreana, (C) A. oligolepis and (D) A. glossodonta. (A) KAUM–I. 80897, 293.5 mm SL, Kagoshima, Japan; (B) KAUM–I. 1246, 250.1 mm SL, Kagoshima, Japan; (C) NSMT-P 129038, 289.0 mm SL, Kagoshima, Japan; (D) NSMT-P 102552, 273.5 mm SL, Okinawa, Japan. Bars indicate 2 mm.

Fig. 3 in Taxonomic Reassessment of Albula (Albuliformes: Albulidae) from Japan and Adjacent Waters with Reliable Records of Albula argentea, A. koreana and A. oligolepis from Japan

Fig. 3. Preserved specimens of (A) Albula argentea, (B) A. glossodonta, (C) A. koreana and (D) A. oligolepis from Japan. (A) KAUM–I. 80897, 293.5 mm SL, Uchinoura Bay, Kagoshima; (B) NSMT-P 102552, 273.5 mm SL, Iriomote-jima Island, Okinawa; (C) KAUM–I. 1246, 250.1 mm SL, Kasasa, Minamisatsuma, Kagoshima; (D) NSMT-P 129038, 289.0 mm SL, Amami-oshima Island, Kagoshima.

Fig. 2 in Taxonomic Reassessment of Albula (Albuliformes: Albulidae) from Japan and Adjacent Waters with Reliable Records of Albula argentea, A. koreana and A. oligolepis from Japan

Fig. 2. Fresh specimens of (A–C) Albula argentea, (D–F) A. koreana and (G–H) A. oligolepis. (A) KAUM–I. 9013, 265.4 mm SL, Kasasa, Minamisatsuma, Kagoshima, Japan; (B) KAUM–I. 50221, 365.2 mm SL, Tanega-shima Island, Kagoshima, Japan; (C) KAUM–I. 60580, 472.0 mm SL, Tanega-shima Island, Kagoshima, Japan; (D) NSMT-P 67748, 243.7 mm SL, Cat Ba Island, Vietnam; (E) KAUM–I. 125129, 246.9 mm SL, Kaohsiung, Taiwan; (F) KAUM–I. 16854, 272.7 mm SL, Terengganu, Malaysia; (G) NSMT-P 129038, 289.2 mm SL, Amamioshima Island, Kagoshima, Japan; (H) KAUM–I. 50222, 373.4 mm SL, Tanega-shima Island, Kagoshima, Japan. Photos by KAUM (A–C, E, F, H) and NSMT (D, G).

Fig. 9 in Taxonomic Reassessment of Albula (Albuliformes: Albulidae) from Japan and Adjacent Waters with Reliable Records of Albula argentea, A. koreana and A. oligolepis from Japan

Fig. 9. Relationships between (A) head length, (B) upper jaw length and (C) mandible length (all as % of SL) and SL (mm) in Albula argentea (red circles), A. koreana (green downward-triangles) and A. oligolepis (yellow upward-triangles).

Fig. 1 in Taxonomic Reassessment of Albula (Albuliformes: Albulidae) from Japan and Adjacent Waters with Reliable Records of Albula argentea, A. koreana and A. oligolepis from Japan

Fig. 1. Fresh specimens of (A) Albula argentea, (B) A. koreana, (C) A. oligolepis and (D) A. glossodonta from Japan. (A) KAUM–I. 80897, 293.5 mm SL, Uchinoura Bay, Kagoshima; (B) KAUM–I. 1246, 250.1 mm SL, Kasasa, Minamisatsuma, Kagoshima; (C) NSMT-P 129038, 289.0 mm SL, Amami-oshima Island, Kagoshima; (D) NSMT-P 102552, 273.5 mm SL, Iriomote-jima Island, Okinawa. Photos by KAUM (A, B), NSMT (C) and H. Kishimoto (D).

Fig.5 in Genetic And Morphological Variability Of Small Vendace (Coregonus Albula (Linnaeus, 1758)) Population In Three Latvian Lakes

Fig.5. Principal component analysis (PCA) plot of the genetic structuring among the three vendace populations. A). PC1 and PC2 explain 25.50% and 21.88% of the total variation, respectively (by allozyme markers); B). PC1 and PC2 explain 19.52% and 13.73% of the total variation, respectively (by RAPD markers).

Fig. 4 in Genetic And Morphological Variability Of Small Vendace (Coregonus Albula (Linnaeus, 1758)) Population In Three Latvian Lakes

Fig. 4. Number of RAPD loci and gene diversity of Coregonus albula in three Latvian lakes, based on RAPD markers.

Fig.3 in Genetic And Morphological Variability Of Small Vendace (Coregonus Albula (Linnaeus, 1758)) Population In Three Latvian Lakes

Fig.3. Allelic richness and polymorphism in Coregonus albula populations in studied lakes based on allozyme markers.

opencc-zeroJan 2021View details →

Data from: Evolution and disappearance of sympatric Coregonus albula in a changing environment - a case study of the only remaining population pair in Sweden

During the past 50 years Fennoscandian populations of spring-spawning Baltic cisco (Coregonus albula), sympatric to common autumn-spawners, have declined or disappeared; e.g., three out of four known spring-spawning populations in Sweden are regarded as extinct. Over the same period, climate has changed and populations have been subject to other anthropogenic stressors. We compared historic (1960s) and recent (1990-2000s) morphological data from the still existent sympatric cisco populations in Lake Fegen, Sweden. Phenotypic changes were found for spring-spawners making them more similar to the sympatric autumn-spawners (that had remained virtually unchanged). Based on results for other salmoniform fishes, a phenotypically plastic response to increased temperature during early development appears unlikely. The recent material was also analysed with microsatellite markers; long-term effective population size in spring-spawners was estimated to be about 20 times lower than autumn-spawners, with signs of long-term gene flow in both directions and a recent genetic bottleneck in spring-spawners. The change towards a less distinct phenotype in spring-spawners is suggested to reflect a recent increase in gene flow from autumn-spawners. Time since divergence was estimated to only c. 1 900 years (95% CI: 400 – 5 900), but still the Fegen populations represent the most morphologically and genetically distinct sympatric populations studied. Consequently, we hypothesise that less distinct population pairs can be even younger, and that spring-spawning may have repeatedly evolved and disappeared in several lakes since the end of the last glaciation, concurrent with changed environmental conditions.

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Fig. 1 in Genetic And Morphological Variability Of Small Vendace (Coregonus Albula (Linnaeus, 1758)) Population In Three Latvian Lakes

Fig. 1. The location of sampling sites. - Lake Sventes, Lake Nirzas and Lake Rāznas.

opencc-zeroNov 2022View details →

Biophysical larval dispersal models of observed bonefish (Albula vulpes) spawning events in Abaco, The Bahamas: An assessment of population connectivity and ocean dynamics

Biophysical models are a powerful tool for assessing population connectivity of marine organisms that broadcast spawn. Albula vulpes is a species of bonefish that is an economically and culturally important sportfish found throughout the Caribbean and that exhibits genetic connectivity among geographically distant populations. We created ontogenetically relevant biophysical models for bonefish larval dispersal based upon multiple observed spawning events in Abaco, The Bahamas in 2013, 2018, and 2019. Biological parameterizations were informed through active acoustic telemetry, CTD casts, captive larval rearing, and field collections of related albulids and anguillids. Ocean conditions were derived from the Regional Navy Coastal Ocean Model American Seas dataset. Each spawning event was simulated 100 times using the program Ichthyop. Ten thousand particles were released at observed and putative spawning locations and were allowed to disperse for the full 71-day pelagic larval duration for A. vulpes. Settlement densities in defined settlement zones were assessed along with interactions with oceanographic features. The prevailing Northern dispersal paradigm exhibited strong connectivity with Grand Bahama, the Berry Islands, Andros, and self-recruitment to lower and upper Abaco. Ephemeral gyres and flow direction within Northwest and Northeast Providence Channels were shown to have important roles in larval retention to the Bahamian Archipelago. Larval development environments for larvae settling upon different islands showed few differences and dispersal was closely associated with the thermocline. Settlement patterns informed the suggestion for expansion of conservation parks in Grand Bahama, Abaco, and Andros, and the creation of a park in Eleuthera and the Berry Islands to protect fisheries. Further observation of spawning events and the creation of biophysical models will help to maximize protection for bonefish spawning locations and nursery habitat, and may help to predict year-class strength for bonefish stocks throughout the Greater Caribbean.

publicNov 2022View details →

Biophysical larval dispersal models of observed bonefish (Albula vulpes) spawning events in Abaco, The Bahamas: An assessment of population connectivity and ocean dynamics

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