Est. 1897. One of USA's oldest scientific journals. The Biological Bulletin publishes original research in broadly related fields of biology.
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ALT Credits: Image of “125” by Melissa D. Smith, University of North Carolina Wilmington. Cover design: Olivia Kinker, University of Chicago Press.
ALT New logo of The Biological Bulletin
ALT The Biological Bulletin
ALT Experimental design for measuring photobehavior of cephalopod larvae.
ALT Oxygen effects on photobehavior of Doryteuthis opalescens paralarvae in a vertical chamber with an overhead light stimulus.
ALT The four broad stages of atmospheric oxygen and life through Earth history, with oxygen in log scale as percent of present atmospheric levels (% PAL). Shown is the best-guess estimate of atmospheric oxygen (thick black line) and geochemical and biologic constraints detailed in the main text (thin black lines bounding blue permissive O2 state space).
ALT Size and shape of various calanoid copepods. Copepods are identified from the top and left to right as Acartia sp., Calanus finmarchicus, Rhincalanus nasutus, Pseudeuchaeta brevicauda, Aetideopsis multiserrata, Gaetanus latifrons, Cephalophanes refulgens, and Bathycalanus princeps. Modified from figure 2 in Mauchline (1998), with permission from Elsevier.
ALT Relationships between copepod growth rate and molting rate as a function of temperature. (A) shows a conceptual model, modified from figure 8 in Miller et al. (1977), reprinted with permission from Wiley, and (B) shows statistical models estimated after an analysis of literature data, modified from Forster et al. (2011), using equations shown in their figure 3, after decentering their regressions.
ALT Conceptual model of copepod weight-specific respiration rate as a function of oxygen partial pressure (pO2) for different-sized copepods. Thick solid lines show the hypothesized oxygen-dependent respiration rate for small (light purple) and large (dark purple) copepods. Shaded areas show the region where the respiration rate is not limited by environmental pO2. Solid horizontal lines show standard metabolic rate (SMR). X symbols show the pO2 at lethal oxygen partial pressure (Pleth) for both sizes of copepod. Vertical dotted lines show the pO2 at critical oxygen partial pressure (Pcrit; large dashes) and Pleth (small dashes) for each copepod size. Red arrows are used to show how both Pcrit and Pleth are hypothesized to increase with increasing size.
ALT Dorsal view of Johngarthia lagostoma crabs and the morphological traits used for the analysis of sexual maturity. (A) Carapace width (CW; scale bar = 50 mm); (B) major cheliped propodus length (PL; scale bar = 10 mm); (C) abdomen width in fifth somite (AW; scale bar = 10 mm); (D) first gonopod length (GP1L; scale bar = 2 mm); and (E) second gonopod length (GP2L; scale bar = 0.5 mm).
ALT Physiological and functional maturity of Johngarthia lagostoma. Representation of sigmoidal curves of physiological (A, B) and functional (C, D) maturity for males and females, respectively, adjusting the empiric points of the adult proportion along the different size classes (CW, carapace width). The white dots indicate the size at which half of the individuals for both sexes are mature (CW 50%).
ALT Chronology of the sexual maturity of Johngarthia lagostoma crabs from Trindade Island considering the different maturity criteria used in the present study for males and females (morphological, physiological, and functional). AW, abdomen width in fifth somite; CW, carapace width; GP1L and GP2L, first and second gonopod length, respectively; PL, major cheliped propodus length.
ALT The Biological Bulletin seal, designed June 2022, UChicago Creative.
ALT Large gastropod veliger collected in a MOCNESS tow at a depth of 375–200 m off of Barbados (sampling station: Tagalong) on June 13, 2012. The shell shape, color, size, and pattern of spines on the periostracum match Scheltema’s description of Charonia variegata, but this veliger was not barcoded to verify its identity.
ALT Schematic representation of five potential mechanisms by which zooxanthellae could be released from the endoderm of cnidarians, and the cellular entities associated with each mechanism. hn, host cell nucleus; m, mesoglea; vm, host vacuolar membrane; zx, zooxanthella (shaded for clarity of presentation). Gates et al., 1992. Biol. Bull. 182: 324–332
ALT Graphic of significant wave heights
ALT A prompt list for SciArtober / IllustraInk. The words are: Submarine, egg, skull, teeth, cell, bone, fossil, reptile, bear, flower, fly, alga, fish, squishy, heart, rodent, footprint, butterfly, roots, bird, plankton, animal with scales, fragmentation, mushrooms, exoskeleton, whiskered, shell, parasites, dolphin, amphora, and snake.