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741 results for “Baja California”
Data from: Climate change and the northern elephant seal (Mirounga angustirostris) population in Baja California, Mexico
The Earth′s climate is warming, especially in the mid- and high latitudes of the Northern Hemisphere. The northern elephant seal (Mirounga angustirostris) breeds and haul-outs on islands and the mainland of Baja California, Mexico, and California, U.S.A. At the beginning of the 21st century, numbers of elephant seals in California are increasing, but the status of Baja California populations is unknown, and some data suggest they may be decreasing. We hypothesize that the elephant seal population of Baja California is experiencing a decline because the animals are not migrating as far south due to warming sea and air temperatures. Here we assessed population trends of the Baja California population, and climate change in the region. The numbers of northern elephant seals in Baja California colonies have been decreasing since the 1990s, and both the surface waters off Baja California and the local air temperatures have warmed during the last three decades. We propose that declining population sizes may be attributable to decreased migration towards the southern portions of the range in response to the observed temperature increases. Further research is needed to confirm our hypothesis; however, if true, it would imply that elephant seal colonies of Baja California and California are not demographically isolated which would pose challenges to environmental and management policies between Mexico and the United States.
Disentangling the coexistence strategies of mud-daubing wasp species through trophic analysis in oases of Baja California peninsula
<p>Species within the same trophic level show different strategies to avoid competition. Among these mechanisms, differences in body size, spatio-temporal segregation, and diet preference often leads to a niche partitioning. Nonetheless, little attention on coexisting predatory insects and their network interactions has been paid. In this study, we analyzed the strategies to avoid competition among three sympatric mud-daubing wasps of the genus <i>Trypoxylon </i>(Hymenoptera: Crabronidae) in oases and their surrounding xeric area from the Baja California peninsula, Mexico. We compared the prey richness, composition and proportion of spider guilds that were captured by the wasps. We tested whether the differences in wasp body size explained the niche breadth, niche overlap and the size of spider prey. We assessed the spider-wasp interactions through a network analysis. With the use of trap-nests, we collected 52 spider species captured by the wasps. Both the guild and species composition of preyed spiders was different between the three wasp species. Differential proportions in the capture of spider guilds and a little diet overlap were found among the wasp species. We found that the wasp body size was positively correlated with prey size, but it was not a <i>proxy </i>of niche breadth. Moreover, the largest wasp species was able to nest in both mesic and xeric habitats, while the two smaller species were restricted to the oases. This study reveals that the diversity of spiders in oases of Baja California peninsula is crucial to maintain highly specialized oasis-dependent wasp species. The niche partitioning between mud-daubing wasps can be shaped by their inherent body size limitations and hunting strategies through foraging specialization for specific spider guilds. Food selection and slight differences in body size reduce competition and allow the coexistence of sympatric wasps. Our study is the first approach exploring the interaction networks between mud-daubing wasps and their spider preys, highlighting new insights into the morphological and ecological factors that shape antagonistic interactions, and allow the coexistence of predators in deserts.</p>
FIGURES 35. Caenotus tanyrhynchus spec. nov., male genitalia. 3 in Description of a new species of Caenotus Cole (Diptera: Scenopinidae) from Baja California Sur, Mexico, with a review of the genus
FIGURES 35. Caenotus tanyrhynchus spec. nov., male genitalia. 3, Dorsal view of male epandrium, setae not illustrated on left side for clarity; 4, Dorsal view of gonocoxite and aedeagal apparatus, setae on dorsal gonostylus not illustrated for clarity; 5, Lateral view of gonocoxite and aedeagal apparatus. aa, aedeagal apodeme; c, cercus; ga, gonocoxal apodeme; gs, gonostylus; h, hypoproct; ps, parameral sheath.
FIGURE 6 in Description of a new species of Caenotus Cole (Diptera: Scenopinidae) from Baja California Sur, Mexico, with a review of the genus
FIGURE 6. Caenotus tanyrhynchus spec. nov., female terminalia. ac, acanthophorite; ag, accessory gland; b1, robust spines of the acanthophorite; b2, fine spines of the acanthophorite; c, cercus; f, furca; h, hypoproct; S8, sternite 8; sp, spermatheca; spd, spermathecal duct; ss, spermathecal sac; ssd, spermathecal sac duct.
FIGURE 5 in Paradella tiffany sp. nov., a distinctive sphaeromatid isopod (Crustacea: Isopoda: Sphaeromatidea) from Baja California, Mexico
FIGURE 5. Paradella tiffany sp. nov. Paratypes. All female except E. A, lateral view; B, dorsal view of pleon; C, posterior view, pleotelson sinus; D, uropod; E, dorsal view of pereonite 7 and pleon, immature male; F, seta from distal margin, uropodal exopod.
FIGURE 4 in Paradella tiffany sp. nov., a distinctive sphaeromatid isopod (Crustacea: Isopoda: Sphaeromatidea) from Baja California, Mexico
FIGURE 4. Paradella tiffany sp. nov. Holotype. A–E, pleopods 1–5 respectively; F, distal angle, pleopod 1 endopod; G, penial processes; H, coupling hooks, pleopod 1. Note: the curving of both the appendix masculina and the penial processes, results from being placed in mounting medium, and is an artefact.
FIGURE 2 in Paradella tiffany sp. nov., a distinctive sphaeromatid isopod (Crustacea: Isopoda: Sphaeromatidea) from Baja California, Mexico
FIGURE 2. Paradella tiffany sp. nov. Holotype. A, right mandible; B, maxilliped; C, maxillule; D, maxilla.
FIGURE 3 in Paradella tiffany sp. nov., a distinctive sphaeromatid isopod (Crustacea: Isopoda: Sphaeromatidea) from Baja California, Mexico
FIGURE 3. Paradella tiffany sp. nov. Holotype. A, pereopod 1; B, pereopod 1 dactylus; C, pereopod 2; D, pereopod 7; E, robust setae from distal margin of pereopod 7 carpus.
FIGURE 1 in Paradella tiffany sp. nov., a distinctive sphaeromatid isopod (Crustacea: Isopoda: Sphaeromatidea) from Baja California, Mexico
FIGURE 1. Paradella tiffany sp. nov. Holotype. A, lateral view; B, dorsal view; C, frons and anterior of head in ventral view; D, pleotelson, posterior margin, ventral view; E, pleotelson sinus, posterior view; F, pleon and pleotelson, perpendicular view; G, antennule; H, antenna.
FIGURE 2 in Description of a new species of Caenotus Cole (Diptera: Scenopinidae) from Baja California Sur, Mexico, with a review of the genus
FIGURE 2. Caenotus tanyrhynchus spec. nov., dorsal view of male tergite 2 showing circular patch of specialized setae.
FIGURE 3 in A new genus and species of high intertidal barnacle (Cirripedia, Tetraclitidae) from Baja California Sur, México
FIGURE 3. Opercular plates of Lissaclita melaniae gen. et sp. nov. External view of scutum (a), internal view of scutum (b), external view of tergum (c), internal view of tergum (d). Scale bar= 200 µm.
FIGURE 5 in A new genus and species of high intertidal barnacle (Cirripedia, Tetraclitidae) from Baja California Sur, México
FIGURE 5. Thoracic appendages of left side of Lissaclita melaniae gen. et sp. nov. Cirrus I (a), cirrus II (b), cirrus III (c), serrate setae of cirrus III (d). Scale bar for a, b, c = 100 µm; scale bar d = 200 µm.
FIGURE 4 in A new genus and species of high intertidal barnacle (Cirripedia, Tetraclitidae) from Baja California Sur, México
FIGURE 4. Exoskeletal parts of Lissaclita melaniae gen. et sp. nov. Labrum (a), first maxilla (b), second maxilla (c), mandible (d), palpus (e). Scale bar = 200 µm.
FIGURES 10–11 in A new species of Chrysobothris Eschscholtz feeding on Dudleya spp. (Crassulaceae) from California and Baja California, with biological, distributional and taxonomic notes on other North American Buprestidae (Coleoptera)
FIGURES 10–11. Otay Mesa & Heritage Roads, San Diego Co., California, July 1988: Fig. 10, general aspect of habitat; Fig. 11, host, Dudleya edulis.
FIGURES 1–6 in A new species of Chrysobothris Eschscholtz feeding on Dudleya spp. (Crassulaceae) from California and Baja California, with biological, distributional and taxonomic notes on other North American Buprestidae (Coleoptera)
FIGURES 1–6. Chrysobothris dudleyaphaga, sp. nov.: Figs. 1–2, adult dorsal habitus, 1, female and 2, male, from San Diego Co., California; Fig. 3, aedeagus from type locality; Fig. 4, larva from Dudleya edulis, San Diego Co.; Fig. 5, pupal cells from Dudleya edulis; Fig. 6, adult exit hole in Dudleya ingens.
FIGURES 8–9 in A new species of Chrysobothris Eschscholtz feeding on Dudleya spp. (Crassulaceae) from California and Baja California, with biological, distributional and taxonomic notes on other North American Buprestidae (Coleoptera)
FIGURES 8–9. Adults at type locality, July 1988: Fig. 8, adult on host, Dudleya ingens; Fig. 9, adult feeding on same host.
FIGURE 5 in A new species of Paradella Harrison & Holdich, 1982 (Crustacea: Isopoda: Sphaeromatidae) from Baja California, Mexico, with a key to East Pacific species
FIGURE 5. Paradella garsonorum sp. nov. SEM. A, lateral male; B, lateral male; C, dorsal male; D, dorsal female; E, pleotelson male; F, pleotelson female.
FIGURE 4 in A new species of Paradella Harrison & Holdich, 1982 (Crustacea: Isopoda: Sphaeromatidae) from Baja California, Mexico, with a key to East Pacific species
FIGURE 4. Paradella garsonorum sp. nov. Paratype (male). A, pleopod 1; B, pleopod 2; C, pleopod 3; D, pleopod 4; E, pleopod 5; F, penes.
FIGURE 3 in A new species of Paradella Harrison & Holdich, 1982 (Crustacea: Isopoda: Sphaeromatidae) from Baja California, Mexico, with a key to East Pacific species
FIGURE 3. Paradella garsonorum sp. nov. Paratype (male). A, pereopod 1; B, pereopod 2; C, pereopod 7.
FIGURE 2 in A new species of Paradella Harrison & Holdich, 1982 (Crustacea: Isopoda: Sphaeromatidae) from Baja California, Mexico, with a key to East Pacific species
FIGURE 2. Paradella garsonorum sp. nov. Paratype (male). A, left mandible; B, right mandible; C, maxillule; D, maxilla; E, maxilliped.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.