Unique behaviors like beak-to-beak mating, den co-occupancy by a mating pair, extended spawning, and unique prey-capture were observed in captive larger Pacific striped octopus. "Behavior and Body Patterns of the Larger Pacific Striped Octopus." Copulation was never seen during these feeding events, but occurred at other times. A feeding frenzy of 12 octopuses of Vulcanoctopus hydrothermalis was observed from the manned submersible ‘Alvin’ at Parigo, a 2620 m deep hydrothermal vent on the East Pacific Rise. Behavior-and-Body-Patterns-of-the-Larger-Pacific-Striped-Octopus-pone.0134152.s006.ogv ‎ (Ogg Theora video file, length 1 min 34 s, 600 × 400 pixels, 1.49 Mbps) Body color patterns were primarily represented by a gradient between all pale, all dark brown, and stripe-bar-spot. 3136-3142 . 2015. When hunting shrimp, a dorsal arm (always arm LI or RI) was extended in an arched fashion and curled at the tip to expose the suckers outward (see Hunting and feeding below; Fig 3A and 3B; S5 Movie). Dr. Arcadio Rodaniche initially mentioned the species in a paper back in 1977 and published a full description of the species in 1991. Chromatophore patterns of hatchlings are also shown. Dec 17, 2018 - Over thirty years ago anecdotal accounts of the undescribed Larger Pacific Striped Octopus suggested behaviors previously unknown for … Therefore any references to the frequency of observations must be interpreted with caution. California Academy of Sciences, San Francisco, California, United States of America, Affiliation Behavior and Body Patterns of the Larger Pacific Striped Octopus. Octopus Behavior. Jump to navigation Jump to search. here. No, Is the Subject Area "Bird eggs" applicable to this article? Try watching this video on www.youtube.com, or enable JavaScript if it is disabled in your browser. All of the unique behaviors listed above were observed for animals in aquaria and are discussed here. We lack precise information about the timing of egg maturation. These accounts included beak-to-beak mating, dens shared by mating pairs, inking during mating, and extended spawning [4–6]. Behavior and body patterns of the larger pacific striped octopus. Mating typically began with the male approaching the female and inserting the hectocotylus into the female’s mantle, in a beak-to-beak position. Instead, crabs were captured when LPSO pounced on them directly. Crawling took place using a variety of body postures and patterns, including the slow bounce posture which included bouncing while crawling (S4 Movie). Because we did not want to sacrifice individuals, we did not perform gut content analysis, which would have been required to confirm feeding by both individuals. While many species of octopus are known for their showy displays of color, the larger Pacific striped octopus is particularly notable for its striking high-contrast display of colors and patterns, which can vary from a pale to dark reddish-brown hue to black with white stripes and … When the larger Pacific striped octopus was first observed in the 1970s, its unusual social and mating behavior were so strange that no one would publish it. Previously, pair bonding has been noted to occur in this species [5]. Mating individuals also frequently grappled arms, females jetted water at males through the funnel, and females pushed males away. During mating, females exhibit all pale body patterns, while males exhibit a darker or higher-contrast display. No, Is the Subject Area "Predation" applicable to this article? In the 1970’s hatching began between days 37–38 (housed at 27–28°C). Roy L. Caldwell 31. Mating almost invariably occurred beak-to-beak and involved agonistic behavior (Fig 4; S6 Movie). This pose was held for 5–10 minutes, during which several of the arms of each animal would line up sucker to sucker (as with the non-feeding individuals in Fig 4C). Maximum size attained in captivity in 2012–2014 was 45 mm ML for males and 70 mm ML for females. While many species of octopus are known for their showy displays of color, the larger Pacific striped octopus is particularly notable for its striking high-contrast display of colors and patterns, which can vary from a pale to dark reddish-brown hue to black with white stripes and spots with both smooth and uneven skin textures. This posture was commonly expressed by animals away from their dens, primarily in the early morning or when tank water was cloudy due to aquarium maintenance. The largest specimen of this species to be scientifically documented was an animal with a live mass of 71 kg (156.5 lb). Beak-to-beak mating, dens shared by mating pairs, inking during mating and extended spawning were mentioned in publications, and enticed generations of cephalopod biologists. [17,51]. To increase transparency, PeerJ operates a system of 'optional signed reviews and history'. This non-invasive study was carried out in accordance with the policies of care outlined by the Association of Zoos and Aquariums, and the Steinhart Aquarium’s Animal Research Committee and Animal Care Committee under the guidance of the Steinhart Aquarium’s Animal Health Department. When brooding females mated, the beak-to-beak position permitted the female to remain in the brooding area with the oral surface facing the male and her mantle facing the eggs. E. Edsinger, G. DölenA conserved role for serotonergic neurotransmission in mediating social behavior in octopus. Although the striking high contrast dark brown and white body color pattern of LPSO is unique among octopuses, similarities in body color pattern and texture can be found. Females typically occupied the same den for the entire duration of captivity, especially after beginning to lay eggs. The cases of beak-to-beak feeding behavior were observed by a pair that, at other times, mated repeatedly and co-occupied den space. This female was observed to build a small rounded mound of sand around the den entrance, sometimes burying the entrance to the den (15 to 31 cm in diameter, up to 5 cm deep in the center). This funding group had no influence on the authors' study design, interpretation, or communication. Slow bounce was often associated with slow movements forward, incorporating an erratic bouncing motion, and a flared arm crown (S4 Movie). The second brooding female accepted matings on three occasions, but rejected attempts by two different males. This study did not require approval of protocols by The University of California, Berkeley Animal Care and Use Committee (our IACUC), which only requires approved protocols for vertebrate animals (Animal Care and Use Program Policy http://www.acuc.berkeley.edu/policies/acu_program.pdf). Data Availability: All relevant data are within the paper and its Supporting Information files. Chromatophore patterns of hatchlings are also shown.Good channel: https://www.youtube.com/DliumSubscribe, like and comment.Good website: https://www.dlium.comBookmark, subscribe and comment. No animals were euthanized. Finally, beak-to-beak mating might allow males to monopolize mating access to females. This generalization does not apply to LPSO, whose females lay eggs for up to six months and brood for up to eight months. They all died a natural senescent death typical of octopus after reproducing. Over thirty years ago anecdotal accounts of the undescribed Larger Pacific Striped Octopus suggested behaviors previously unknown for octopuses. These rejections by the second female might have taken place during early senescence. No damaging injures occurred. 2015; 10: e0134152. https://doi.org/10.1371/journal.pone.0134152.s003, https://doi.org/10.1371/journal.pone.0134152.s004, https://doi.org/10.1371/journal.pone.0134152.s005, https://doi.org/10.1371/journal.pone.0134152.s006. The larger Pacific striped octopus exhibits a striking high-contrast display of colors and patterns, which can vary from a pale to dark reddish-brown hue to black with white … before the start of the next class. Two females were introduced to males while brooding. LPSO occupies regions with a soft mud substrate, or a mix of mud and sand. Due to the small number of specimens we did not want to risk damaging the eggs or adults to conduct detailed inspections. PLoS ONE 10(8): Likewise, we do not know whether LPSO living in groups visually recognize conspecifics, which is associated with reduced physical aggression and increased localized avoidance with familiar individuals in Octopus vulgaris [60]. This manuscript was improved by constructive comments from Stephanie Bush, Roger Hanlon and two anonymous reviewers. Instead, LPSO bears low conical mantle papillae. Although a species description of LPSO is forthcoming by other authors, we provide detailed photographs and descriptions of live individuals that should allow for easy identification, and provide a guide for future ethological studies. Larger Pacific striped octopuses are known for their beautiful stripes and polka dots, and they also appear to be more social than any other known species of octopus. We thank Elizabeth Palomeque for her patronage and support of this project, as well as Jean Auplay, Marisa Avila and Kalin Ross for their help in the care of the animals during this study. 1. https://doi.org/10.1371/journal.pone.0134152, Editor: Claude Wicker-Thomas, CNRS, FRANCE, Received: April 30, 2015; Accepted: July 6, 2015; Published: August 12, 2015, Copyright: © 2015 Caldwell et al. before the start of the next class. Papillae shape was conical rather than flap-like or branched. Behavior-and-Body-Patterns-of-the-Larger-Pacific-Striped-Octopus-pone.0134152.s004.ogv ‎ (Ogg Theora video file, length 25 s, 640 × 360 pixels, 2.73 Mbps) Ltda., Managua, Nicaragua, a firm that holds permits to collect and export octopus. Those populations with grouped dens and/or especially high local densities appear also to exhibit more frequent intraspecific interactions, aggression, and/or more complex mating associations than exhibited by more solitary octopuses [27,41,56–59]. Larger Pacific Striped Octopuses mate in a beak-to-beak position, as if kissing. adshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A Oct 14, 2019 - Over thirty years ago anecdotal accounts of the undescribed Larger Pacific Striped Octopus suggested behaviors previously unknown for … Large-scale population density and sex ratios are not known. However, in T. mimicus the elements of these patterns are less clearly delineated [49], and in W. photogenicus [50] they are reversed, with bars on the arms and pale spots on the mantle rather than vice versa in LPSO. In a posture we call slow bounce, in which animals exhibited darker coloration, flattened body with the dorsal arms were held forward, while the upwardly-arched arms and mantle were alternately raised and lowered slowly (Fig 3H). Behavioral terminology follows descriptions in the literature for other species, or were defined here if no established term was available. When decapods mate head-to-head the male’s funnel is positioned near the female’s buccal region, where spermatophores are often placed during copulation [33,36,37]. California Academy of Sciences, San Francisco, California, United States of America, Roy L. Caldwell et al (2015), PLoS ONE http://dx.doi.org/10.1371/journal.pone.0134152Over thirty years ago anecdotal accounts of the undescribed Larger Pacific Striped Octopus suggested behaviors previously unknown for octopuses. Modes of locomotion follow those outlined previously [22]. Octopuses were shipped to the wholesalers within four days of capture, and then shipped to the authors within four days of arriving in the United States. https://doi.org/10.1371/journal.pone.0134152.g002. We recorded interactions between octopuses from 52.8 hr of video during a long-term study of octopus behavior in Jervis Bay, Australia (see the Supplemental Experimental Procedures).From n = 186 interactions, we recorded n = 345 body patterns and darkness of interacting individuals, along with n = 512 actions such as reaches within interactions. Yes Individuals observed in 2012–2014 consistently drilled Littorina shells near the operculum (Fig 3I). Octopus zonatus, another Harlequin octopus, bears body patterning similar to O. chierchiae [2]. All photos by RLC. Senescence, marked in octopuses by the abrupt cessation or gradual reduction in feeding [31], appeared to take longer for females than males. here. Males were not housed together, and as such we did not have the opportunity to observe- possible male-male aggression. Mating and egg laying, and as such we did not move for three to four weeks dying! Hunting and feeding section below ) and are discussed here G. 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