Investigations of Horizontal Movements of Atlantic Swordfish Using Pop-up Satellite Archival Tags

Neilson, John D.; Smith, Sean C.; Royer, François; Paul, Stacey; Porter, Julie; Lutcavage, Molly

doi:10.1007/978-1-4020-9640-2_9

Cited by 34 publications

(65 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, the Atlantic bluefin tuna (30), salmon shark (11), blue whale (31), northern fur seal (32), and leatherback turtle (a turtle with warmed body core) (33) migrate between temperate and tropical (or subpolar and subtropical) habitats, and no fishes without RM endothermy perform migrations over similar spatial scales. Another notable example is the swordfish, which migrates between temperate and tropical habitats (34), a spatial scale that is the largest among fishes without RM endothermy (Fig. 2).…”

Section: Resultsmentioning

confidence: 99%

Comparative analyses of animal-tracking data reveal ecological significance of endothermy in fishes

Watanabe

Goldman

Caselle

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

113

139

View full text Add to dashboard Cite

Despite long evolutionary separations, several sharks and tunas share the ability to maintain slow-twitch, aerobic red muscle (RM) warmer than ambient water. Proximate causes of RM endothermy are well understood, but ultimate causes are unclear. Two advantages often proposed are thermal niche expansion and elevated cruising speeds. The thermal niche hypothesis is generally supported, because fishes with RM endothermy often exhibit greater tolerance to broad temperature ranges. In contrast, whether fishes with RM endothermy cruise faster, and achieve any ecological benefits from doing so, remains unclear. Here, we compiled data recorded by modern animal-tracking tools for a variety of free-swimming marine vertebrates. Using phylogenetically informed allometry, we show that both cruising speeds and maximum annual migration ranges of fishes with RM endothermy are 2-3 times greater than fishes without it, and comparable to nonfish endotherms (i.e., penguins and marine mammals). The estimated cost of transport of fishes with RM endothermy is twice that of fishes without it. We suggest that the high energetic cost of RM endothermy in fishes is offset by the benefit of elevated cruising speeds, which not only increase prey encounter rates, but also enable larger-scale annual migrations and potentially greater access to seasonally available resources. marine predator | swim speed | migration | body temperature I n 1835, the British physician John Davy reported that skipjack tuna have body temperatures 10°C higher than ambient waters and considered this fish an exception to the general rule that fishes are cold-blooded (1). It is currently known that at least 14 species of tuna (family Scombridae) and five species of shark (four species in the family Lamnidae and one species in the family Alopiidae) have the ability to retain metabolic heat via vascular countercurrent heat exchangers, and to maintain the temperature of slow-twitch, aerobic red muscle (hereafter denoted RM) significantly above that of the ambient water (2-7). This "RM endothermy" (see SI Materials and Methods for terminology) in fishes represents a remarkable example of convergent evolution, because bony fishes and cartilaginous fishes diverged as long as 450 million years ago (8). In addition to elevated RM temperature, tunas and endothermic sharks share a number of morphological (e.g., medially located RM), physiological (e.g., high metabolic rates), and ecological (e.g., highly mobile and predatory lifestyle) characteristics (9).RM endothermy is an energetically expensive thermal strategy (9), and its convergent evolution indicates that the extra energetic costs incurred by RM endothermy can be outweighed by some ecological advantages. This topic has been discussed intensively, and two primary, nonmutually exclusive hypotheses have been proposed: expansion of the thermal niche and elevated cruising speeds (2). The thermal niche hypothesis states that fishes with RM endothermy can tolerate a broader range of water temperatures and, thus, can expand thei...

show abstract

Section: Resultsmentioning

confidence: 99%

Comparative analyses of animal-tracking data reveal ecological significance of endothermy in fishes

Watanabe

Goldman

Caselle

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

113

139

View full text Add to dashboard Cite

show abstract

“…Atlantic swordfish appear to spawn throughout the year, and spawning timing tends to vary among different spawning areas (Tables 9.21 and 9.22). Seasonal latitudinal migrations of swordfish, which may result from seasonal changes in sea surface temperature, are well documented (Nakamura 1985;Seki et al 2002;Takahashi et al 2003;Neilson et al 2009). …”

Section: Nmfs (2009b)mentioning

confidence: 99%

Fish Resources of the Gulf of Mexico

Chen

2017

Habitats and Biota of the Gulf of Mexico: Before the Deepwater Horizon Oil Spill

View full text Add to dashboard Cite

“…The movement of swordfish is one of the most complex among pelagic fishes (Dewar et al, 2011). Previous swordfish tagging studies in the Atlantic, Pacific, and Mediterranean Sea have revealed large horizontal and vertical distribution patterns that vary considerably with season, gender, and ocean basin (Sedberry and Loefer, 2001;Neilson and Smith, 2010;Sepulveda et al, 2010;Dewar et al, 2011). Pop-up satellite archival tags (PSAT) are integrated with the combined technology of satellite telemetry and archival data storage tags.…”

Section: Introductionmentioning

confidence: 99%

“…These tagging studies also show that swordfish usually descend to depth one hour before sunrise and ascend after sunset. This is referred to as crepuscular diving behavior, and is a typical foraging strategy strongly associated with movement of the deep sound scattering layer (Sepulveda et al, 2010;Dewar et al, 2011). PSATs archive ambient light-level data, which are often used to estimate geolocation.…”

Section: Introductionmentioning

confidence: 99%

A Principal Component Analysis of Vertical Temperature Profiles for Tracking Movements of Large Pelagic Fishes

Carmody¹,

Mariano²,

Kerstetter³

2017

AST

View full text Add to dashboard Cite

Pop-up satellite archival tag (PSAT) technology that records depth, temperature, and light-level data has expanded the understanding of free-swimming behavior for numerous pelagic animals. Astronomical algorithms using these light-level data have allowed geolocation estimates of daily longitude and latitude. However, many pelagic animals have a crepuscular behavior pattern in which individuals are at depths below the photic layer during the day, thus precluding the use of traditional light-based movement algorithms for geolocation in such species as swordfish. A principal component analysis (PCA) of temperature profiles is described herein that utilizes depth and temperature data rather than light to estimate the horizontal movement between the initial location of tag release and transmission. PSAT data from swordfish (n=4), blue marlin (n=14), white marlin (n=2), and Aquatic Science and Technology ISSN 2168-9148 2017, Vol. 5, No. 1 34 black marlin (n=1) were used to generate daily coordinate estimates. The marlin data provided sufficient light information to derive geolocation estimates using two light-based state space models, while the hydrographic PCA model was used to derive comparison estimates. Comparisons of the two model types show an average root mean square difference of 175.4 km demonstrating that the PCA model can be used to extract the movement of tagged swordfish and other pelagic species demonstrating crepuscular behavior. Integration of this PCA-based geolocation methods with both the best available estimates of the ocean temperature at the time of tag deployment and the existing light-based geolocation models would provide additional information on fine-scale movement of tagged fish.

show abstract

Investigations of Horizontal Movements of Atlantic Swordfish Using Pop-up Satellite Archival Tags

Cited by 34 publications

References 16 publications

Comparative analyses of animal-tracking data reveal ecological significance of endothermy in fishes

Comparative analyses of animal-tracking data reveal ecological significance of endothermy in fishes

Fish Resources of the Gulf of Mexico

A Principal Component Analysis of Vertical Temperature Profiles for Tracking Movements of Large Pelagic Fishes

Contact Info

Product

Resources

About