{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,10]],"date-time":"2025-12-10T15:23:50Z","timestamp":1765380230265,"version":"3.41.2"},"reference-count":44,"publisher":"Oxford University Press (OUP)","issue":"1","license":[{"start":{"date-parts":[[2022,7,4]],"date-time":"2022-07-04T00:00:00Z","timestamp":1656892800000},"content-version":"vor","delay-in-days":184,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2022,7,18]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:sec>\n                  <jats:title>Synopsis<\/jats:title>\n                  <jats:p>The unusual shape of sphyrnid (hammerhead shark) heads has led to many functional hypotheses of potential sensory advantages and enhanced olfactory performance. Recent investigations into the flow of water within the sphyrnid olfactory chamber demonstrate that this complex structure exhibits a differential pressure system between the 2 nares that induces flow through the chamber. This leads to differential fluid velocities in different parts of the olfactory chamber. Particularly, lamellae at the medial end of the olfactory chamber experience a near-stagnant recirculation of water. The objectives of this study were to (1) describe the microstructure of the olfactory rosette of bonnethead sharks (Sphyrna tiburo) and (2) given the variability of water flow within the sphyrnid olfactory rosette, investigate differences of individual lamellae based on their positioning within the rosette. Specifically, we investigated degree of secondary folding, percent sensory area, and relative surface along the lateral-to-medial gradient. Both degree of secondary folding and percent sensory area may serve as proxies for olfactory sensitivity, providing connectivity between area devoted to sensitivity and water flow within the olfactory organ. We found that bonnethead sharks exhibited similar lamellar morphology to other shark species. We also described the projection of the olfactory nerve layer through an individual lamella. Additionally, we found that lamellae within the medial portion of the organ, which experience slower water velocities, had less secondary lamellar folds and less sensory area. These findings imply that these areas may be less sensitive. Future work should test for sensitivity differences within the rosette along the lateral-to-medial gradient.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Spanish<\/jats:title>\n                  <jats:p>La forma inusual de las cabezas de los esf\u00edrnidos (tiburones martillo) ha llevado a muchas hip\u00f3tesis funcionales de posibles ventajas sensoriales y unas mejores capacidades olfativas. Las investigaciones recientes sobre el flujo de agua dentro del \u00f3rgano olfativo de los esf\u00edrnidos, demuestran que esta estructura compleja exhibe un sistema de presi\u00f3n diferente entre las dos fosas nasales que induce el flujo en el \u00f3rgano. Esto conduce a velocidades de fluido diferentes en distintas partes del \u00f3rgano olfativo. En particular, las l\u00e1minas en el extremo medial del \u00f3rgano olfativo experimentan una recirculaci\u00f3n de agua casi estancada. Los objetivos de este estudio fueron 1) describir la microestructura de la roseta olfativa de los tiburones cabeza de pala (Sphyrna tiburo) y 2) considerando la variabilidad del flujo de agua dentro de la roseta olfativa de los esf\u00edrnidos, investigar las diferencias de las laminillas individuales, basadas en su posici\u00f3n dentro de la roseta. Espec\u00edficamente, hemos investigado el grado de plegamiento secundario, el porcentaje del \u00e1rea sensorial y el \u00e1rea relativa de superficie a lo largo del gradiente de lateral a medial. El grado de plegamiento secundario y el porcentaje del \u00e1rea sensorial pueden servir como indicadores de la sensibilidad olfativa, proporcionando conectividad entre el \u00e1rea dedicada a la sensibilidad y el flujo de agua dentro del \u00f3rgano olfativo. Descubrimos que los tiburones cabeza de pala exhib\u00edan una morfolog\u00eda laminar similar a la de otras especies de tiburones. Tambi\u00e9n hemos descrito la proyecci\u00f3n del estrato del nervio olfativo dentro de una l\u00e1mina individual. Adem\u00e1s, encontramos que las laminillas dentro de la porci\u00f3n medial del \u00f3rgano que experimentan velocidades de agua m\u00e1s lentas, ten\u00edan menos pliegues laminares secundarios y una menor \u00e1rea sensorial. Estos hallazgos implican que estas \u00e1reas pueden ser menos sensitivas. El trabajo futuro deber\u00eda evaluar las diferencias de sensibilidad dentro de la roseta a lo largo del gradiente de lateral a medial.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>German<\/jats:title>\n                  <jats:p>Die ungew\u00f6hnliche Kopfform der Sphyrniden (Hammerhaie) hat schon zu vielen funktionellen Hypothesen bez\u00fcglich m\u00f6glicher sensorischer Vorteile und verbesserter olfaktorischer Leistung gef\u00fchrt. K\u00fcrzlich ver\u00f6ffentlichte Studien zur Wasserstr\u00f6mung innerhalb der olfaktorischen Kammern von Sphyrniden zeigen, dass diese komplexe Struktur unterschiedliche Drucksysteme zwischen den beiden Nasenl\u00f6chern erzeugt, welches eine Str\u00f6mung durch die Nasenkammer erzeugt. Dies wiederum f\u00fchrt zu unterschiedlichen Fl\u00fcssigkeitsstr\u00f6mungen in verschiedenen Abschnitten der olfaktorischen Kammer. Besonders bei den Lamellen am medialen Ende der olfaktorischen Kammer gibt es eine fast schon stillstehende Rezirkulation von Wasser. Die Ziele dieser Studie waren 1) das Beschreiben der Mikrostruktur der olfaktorischen Rosette des Schaufelnasen-Hammerhais (Sphyrna tiburo) und 2) wollten wir, aufgrund der Variabilit\u00e4t der Wasserstr\u00f6mung innerhalb der olfaktorischen Rosette der Sphyrniden, die Unterschiede von individuellen Lamellen basierend auf ihrer unterschiedlichen Position innerhalb der Rosette untersuchen. Wir untersuchten den Grad an sekund\u00e4ren Falten, den Prozentsatz an sensorischer Fl\u00e4che und die relative Oberfl\u00e4che entlang dem lateral-zu-medialem Gradienten. Sowohl der Grad an sekund\u00e4ren Falten wie auch der Prozentsatz an sensorischer Fl\u00e4che m\u00f6gen als Ann\u00e4herung f\u00fcr die olfaktorische Sensibilit\u00e4t dienen, weil sie f\u00fcr eine Verbindung zwischen der Fl\u00e4che, die dem Geruchssinn und der Str\u00f6mung zwischen den olfaktorischen Organen sorgt. Wir fanden, dass die Schaufelnasen-Hammerhaie eine \u00e4hnliche lamellare Morphologie zeigen wie andere Hai-Arten. Wir beschreiben auch wie der Geruchsnerv durch eine individuelle Lamelle verl\u00e4uft. Weiter fanden wir, dass die Lamellen innerhalb des mittleren Teils des Organs, welches geringe Str\u00f6mungsgeschwindigkeiten erf\u00e4hrt, weniger sekund\u00e4re lamellare Falten enth\u00e4lt und weniger sensorische Fl\u00e4che. Diese Entdeckungen implizieren, dass diese Bereiche weniger sensibel sind auf Ger\u00fcche. Zuk\u00fcnftige Arbeiten sollten die unterschiedlichen Sensibilit\u00e4ten innerhalb der Rosette entlang des lateral-medialem Gradienten testen.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1093\/iob\/obac027","type":"journal-article","created":{"date-parts":[[2022,7,4]],"date-time":"2022-07-04T20:37:13Z","timestamp":1656967033000},"source":"Crossref","is-referenced-by-count":5,"title":["Microstructure of the Bonnethead Shark (<i>Sphyrna tiburo<\/i>) Olfactory Rosette"],"prefix":"10.1093","volume":"4","author":[{"given":"Lauren E","family":"Simonitis","sequence":"first","affiliation":[{"name":"Department of Marine Biology, Texas A&M University , Galveston Campus, Galveston, TX 77553 , USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christopher D","family":"Marshall","sequence":"additional","affiliation":[{"name":"Department of Marine Biology, Texas A&M University , Galveston Campus, Galveston, TX 77553 , USA"},{"name":"Department of Ecology and Conservation 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